Dell Latitude 7390 Owner's Manual Regulatory Model: P28S Regulatory Type: P28S002
Notes, cautions, and warnings NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. © 2018 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries.
1 Working on your computer Safety precautions The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions. Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or reassembly: • Turn off the system and all attached peripherals. • Disconnect the system and all attached peripherals from AC power.
tracing is merely weakened and does not immediately produce outward symptoms related to the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory integrity, intermittent memory errors, etc. The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded") failure. Perform the following steps to prevent ESD damage: • Use a wired ESD wrist strap that is properly grounded.
ESD protection summary It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while performing service and that they use anti-static bags for transporting sensitive components.
8 Remove any installed ExpressCards or Smart Cards from the appropriate slots. After working inside your computer After you complete any replacement procedure, ensure that you connect external devices, cards, and cables before turning on your computer. CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for other Dell computers.
2 Removing and installing components This section provides detailed information on how to remove or install the components from your computer. Recommended tools The procedures in this document require the following tools: • Phillips #0 screwdriver • Phillips #1 screwdriver • Small plastic scribe Screw size list Table 1. Latitude 7390 - screw size list Component Back cover M2.5x 6.0 M2.0 x 5.0 M2.5 x 3.5 M2.0x3.0 M2.5x4.0 M2.0 x 2.
Component M2.5x 6.0 M2.0 x 5.0 M2.5 x 3.5 M2.0x3.0 M2.5x4.0 M2.0 x 2.5 Keyboard support plate M2.0 x 2.0 19 Keyboard 5 System board 8 Memory module bracket 1 Subscriber Identification Module (SIM) card Removing SIM card or SIM card tray NOTE: SIM card or SIM card tray removal is only available on systems that are shipped with WWAN module. Hence, removing procedure is only applicable for systems that are shipped with WWAN module.
Base cover Removing base cover 1 Follow the procedure in Before working inside your computer. 2 To release the base cover: a Loosen the M2.5 x 6.0 captive screws (8) that secure the base cover to the computer [1]. b Remember: Exercise caution when loosening the screws. Angle the screw driver to match the head of the screw to avoid a possible stripped screw head. Use a plastic scribe to release the base cover from the edge and lift it from the computer [2].
Installing base cover 1 Align the base cover tabs to the slots on the edges of the computer. 2 Press the edges of the cover until it clicks into place. 3 Tighten the M2.5 x 6.0 captive screws to secure the base cover to the computer. Remember: Exercise caution when tightening the screws. Angle the screw driver to match the head of the screw to avoid a possible stripped screw head. 4 Follow the procedure in After working inside your computer.
Installing 3-cell battery 1 Insert the battery into the slot on the computer. 2 Route the battery cable through the routing clip and connect the battery cable to the connector on the system board. NOTE: Route the battery cable, if the cable at the base of the battery is un-routed. 3 Replace the M2.0 x 5.0 screw to secure the battery to the computer. 4 Install the base cover 5 Follow the procedure in After working inside your computer.
Installing 4-cell battery 1 Insert the battery into the slot on the computer. 2 Route the battery cable through the routing clip and connect the battery cable to the connector on the system board. NOTE: Route the battery cable, if the cable at the base of the battery is un routed. 3 Replace the two M2.0 x 5.0 screws to secure the battery to the computer. 4 Install the base cover 5 Follow the procedure in After working inside your computer.
Removing PCIe SSD without bracket 1 Follow the procedure in Before working inside your computer. 2 Remove the : a b 3 base cover battery To remove the PCIe SSD: a b Loosen the M2.0x3.0 captive screw that secure the SSD bracket [1]. Slightly lift the SSD and pull out from its connector [2]. NOTE: Ensure to lift the PCle SSD card by an angle NOT more than 30°.
Installing PCIe SSD 1 Insert the PCIe SSD card into the connector. 2 Install the SSD bracket over the PCIe SSD card. NOTE: When installing the SSD bracket, ensure that the tab on the bracket is held securely with the tab on the palm rest. NOTE: Ensure to install the bracket is the system is shipped with bracket. 3 Tighten the M2.0x3.0 screws to secure it the SSD bracket. 4 Install the base cover. 5 Follow the procedure in After working iinside your computer.
Installing SATA SSD 1 Insert the SATA SSD card into the connector. 2 Tighten the screw to secure the SATA SSD to the system board. 3 Install the base cover. 4 Follow the procedure in After working inside your computer. Speaker Removing speaker module 1 Follow the procedure in Before working inside your computer. 2 Remove the: a b 3 base cover battery To release the speaker module: a Push the pin to disconnect the speaker cable from the connector on the system board [1].
b c 4 Un-route the speaker cable from the routing clips [2,3]. Remove the tape that secures the speaker cables to the touchpad board [4]. To remove the speaker module: a b Remove the M2.0x3.0 screws (4) that secure the speaker module to the computer [1]. Lift the speaker module from the computer [2]. NOTE: Ensure to un-route the speaker cable from the routing clips.
Installing speaker module 1 Place the speaker module into the slots on the computer. 2 Route the speaker cable through the retention clips on the computer. 3 Connect the speaker cable to the connector on the system board. 4 Install the: a b 5 battery base cover Follow the procedure in After working inside your computer. Coin cell battery Removing the coin cell battery 1 Follow the procedure in Before working inside your computer.
Installing coin cell battery 1 Affix the coin cell battery on the slot inside the computer. 2 Route the coin cell battery cable through the routing channel before connecting the cable. 3 Connect the coin cell battery cable to the connector on the system board. 4 Install the : a b 5 battery base cover Follow the procedure in After working inside your computer. WWAN card Removing WWAN card 1 Follow the procedure in Before working inside your computer.
b c Lift the metal bracket that secures the WWAN card [2]. Disconnect the WWAN cables from the connectors on the WWAN card with a plastic scribe.[3]. d NOTE: Ensure to press the WWAN card, and then release the cables from the connectors. Slide and lift the WWAN card from the connector on the system board [4].Lift the WWAN card from the computer . NOTE: Ensure to lift the WWAN card by an angle NOT more than 35°. Installing WWAN card 1 Insert the WWAN card into the connector on the system board.
WLAN card Removing WLAN card 1 Follow the procedure in Before working inside your computer. 2 Remove the : a b 3 base cover battery To remove the WLAN card: a b c d Remove the M2.0 x 3.0 screw that secures the metal bracket to the WLAN card [1]. Lift the metal bracket [2]. Disconnect the WLAN cables from the connectors on the WLAN card [3]. Remove the WLAN card from the computer [4]. NOTE: Ensure NOT to pull the WLAN card more than 35°, to avoid damage to pin.
4 Install the .: a b 5 battery base cover Follow the procedure in After working inside your computer. Memory modules Removing memory module 1 Follow the procedure in Before working inside your computer. 2 Remove the : a b 3 base cover battery To remove the memory module: a b Pull the clips securing the memory module until the module snaps-out [1]. Remove the memory module from the connector on the system board [2]. NOTE: Ensure to lift the memory module card by an angle NOT more than 35°.
Installing memory module 1 Insert the memory module into the connector until snaps in. 2 Install the : a b 3 battery base cover Follow the procedures in After working inside your computer. Heat sink Removing heat sink assembly Heat sink assembly comprises of heat sink and the system fan. 1 Follow the procedure in Before working inside your computer.
Installing heat sink assembly Heat sink assembly comprises of heat sink and the system fan. 1 Align the heat sink assembly with screw holders on the system board and tighten the screws (4) to the system board. 2 Tighten the M2.0 x 5.0 screws to secure the fan to the system board 3 Connect the fan cable to the connector on the system board. 4 Install the : a b 5 battery base cover Follow the procedure in After working inside your computer.
b c d Remove the M2.0x3.0 screw (1) to release the metal bracket on the power connector port [2]. Lift the metal bracket from the computer [3]. Remove the power connector port from the computer [4]. Installing power connector port 1 Install the power connector port into the slot on the computer. 2 Place the metal bracket on the power connector port. 3 Tighten the M2.0x3.0 screw to secure the power connector port to the computer.
3 To remove the LED board: a Disconnect the LED cable from the LED board [1]. b c d CAUTION: Avoid pulling the cable as it would result in breaking the cable connector. Instead, use a scribe to release the LED cable from its connector. Unroute the LED cable from the routing channel [2]. Remove the M2.0 x 2.5 (1) screw that secures the LED board to the computer [3] Lift the LED board from the computer [4]. Installing LED board 1 Insert the LED board into the slot on the computer.
Smart card module Removing smart card cage 1 Follow the procedure in Before working inside your computer. 2 Remove the: a b c 3 base cover battery PCIe SSD card To disconnect the smart card cable: a Disconnect the smart card cable [1]. b NOTE: Ensure to gently push the connector, to avoid damage to the smart card head. Lift the smart card cable that is affixed to the touchpad module [2]. NOTE: Ensure to pull gently to release it with adhesive tape.
Installing smart card cage 1 Slide the smart card cage into the slot to align with the tabs on the computer. 2 Tighten the M2.0 x 3.0 screws to secure the smart card cage to the computer. 3 Affix the smart card cable and connect it to the connector on the computer . 4 Install the: a b c 5 PCIe SSD card battery base cover Follow the procedure in After working inside your computer. Touchpad buttons board Removing touchpad buttons board 1 Follow the procedure in Before working inside your computer.
3 To disconnect the smart card cable: a b c 4 28 Disconnect the smart card cable [1]. Lift the smart card cable that is affixed to the computer [2] to reveal the touchpad buttons board cable. Remove the adhesive tape that secures the speaker cable to the touchpad panel [3]. To remove the touchpad buttons board: a Disconnect the touchpad buttons board cable from the touchpad board [1]. b NOTE: The touchpad buttons board cable is below the smart card cable.
Installing touchpad buttons board 1 Insert the touchpad buttons board into the slot to align the tabs with the grooves on the computer. 2 Tighten the screws to secure the touchpad buttons board to the computer. 3 Connect the touchpad buttons board cable to the connector on the touchpad board. 4 Affix the smart card cable and connect it to the connector on the computer 5 Install the: a b c 6 speaker battery base cover Follow the procedure in After working inside your computer.
d WWAN card NOTE: To identify the number of screws, see screw list 3 4 To remove the display assembly: a b c d Unroute the WLAN and WWAN cables from the routing channels [1]. Remove the M2.0 x 5.0 screws that secures the eDP bracket [2]. Lift the eDP bracket from the eDP cable [3]. Disconnect the eDP cable from its connector on the system board [4]. e NOTE: In touch-configuration system, you need to remove the touch display cable connected to its connector on the system board.
Installing display assembly 1 Place the base of the computer on a plane surface of a table and position it closer to the edge of the table. 2 Install the display assembly to align it with the display hinge holders on the system. 3 Holding the display assembly, tighten the M2.5 x 4.0 screws to secure the display hinges on the system display assembly with the system unit. 4 Affix the tapes to secure the eDP cable (display cable).
Display hinge cap Removing display hinge Cap 1 Follow the procedure in Before working inside your computer. 2 Remove the: a b c d e base cover battery WLAN card WWAN card display assembly NOTE: To identify the number of screws, see screw list 3 Push the display hinge cap to the right. 4 Remove the display hinge cap. Installing display hinge Cap 1 Insert the display hinge cap to the display assembly. 2 Push the display hinge cap to the left to secure it.
3 Install the: a b c d e 4 display assembly WLAN card WWAN card battery base cover Follow the procedure in After working inside your computer. System board Removing system board 1 Follow the procedure in Before working inside your computer. 1 If your computer is shipped with a WWAN card, then the removal of a blank SIM card tray is a requirement.
4 To disconnect the eDP cable: a b c d e 34 Un route the WLAN and WWAN cables from the routing channels [1]. Remove the M2.0 x 3.0 screw (2) and lift the eDP cable bracket that secures to the system board [2,3]. Disconnect the clip that secures the cable to the system board [4]. Remove the adhesive tape that secures the eDP cable [5]. Disconnect the eDP cable from the system board [6].
5 To disconnect the cables: NOTE: To disconnect the speaker, LED board, coin cell battery and the power connector port cables, use a plastic scribe to release the cables from the connectors.
6 36 To remove the system board: a Remove the M2.0x5.0 screws (8) that secure the USB Type-C bracket [1]. b c NOTE: Image does not display the USB type-C bracket removal. Flip the system board, peel off the tapes securing the bracket and remove the USB Type-C port from the system board. Lift the system board away from the computer [2].
Installing system board 1 Place the USB Type-C port along with the bracket in the slot on the system board. 2 Affix the tape to secure the Type-C port bracket. 3 Flip the system board and tighten the M2.0x5.0 screws to secure the USB type-C port. 4 Align the system board with the screw holders on the computer. 5 Tighten the M2.0 x 5.0 screws to secure the system board to the computer.
i 12 base cover Follow the procedure in After working inside your computer. Keyboard assembly Removing keyboard assembly NOTE: The keyboard and the keyboard tray together are called the keyboard assembly. 1 Follow the procedure in Before working inside your computer.
NOTE: To identify the screws, see screw list a b 5 Remove the M2.0 x 2.5 screws (19) that secure the keyboard [1]. Lift the keyboard assembly from the chassis [2]. Remove the screws (5) that secures the keypad to the keyboard chassis and lift the keyboard [1,2].
NOTE: Remove the keyboard chassis when you encounter malfunction in the keyboard, after validating with a working laptop. Installing keyboard assembly NOTE: The keyboard and the keyboard tray together are called the keyboard assembly. 1 Align the keyboard assembly with the screw holders on the computer. 2 Tighten the M2.0 x 2.5 screws that secure the keyboard to the chassis. 3 Connect the keyboard cable, keyboard backlight cable, touchpad cable cable to the connectors on the touchpad buttons board.
Keyboard Removing keyboard from keyboard tray 1 Follow the procedure in Before working inside your computer. 2 Remove the keyboard assembly 3 Remove the M2.0 x 2.0 screws that secure the keyboard to the keyboard assembly [1]. 4 Lift the keyboard away from the keyboard tray [2]. Installing keyboard to keyboard tray 1 Align the keyboard with the screw holders on the keyboard tray. 2 Tighten the M2.0 x 2.0 screws to secure the keyboard to the keyboard tray. 3 Install the keyboard assembly.
Palm rest Replacing palm rest 1 Follow the procedure in Before working inside your computer. 2 Remove the: a b c d e f g h i j k l m base cover battery memory module PCIe SSD WLAN card WWAN card power connector port heat sink assembly coin cell battery speaker display assembly system board keyboard The component you are left with is the palm rest. 3 Replace the palm rest.
d e f g h i j k l m 5 speaker coin cell battery heatsink power connector port WLAN card WWAN card PCIe SSD memory battery base cover Follow the procedure in After working inside your computer.
3 Technology and components This chapter details the technology and components available in the system. Topics: • • USB features HDMI 1.4 USB features Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplified the connection between host computers and peripheral devices like mice, keyboards, external drivers, and printers. Let's take a quick look on the USB evolution referencing to the table below. Table 2. USB evolution Type Data Transfer Rate Category Introduction Year USB 3.
commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480Mbps and 12Mbps respectively and are kept to maintain backward compatibility. USB 3.0/USB 3.1 Gen 1 achieves the much higher performance by the technical changes below: • An additional physical bus that is added in parallel with the existing USB 2.0 bus (refer to the picture below). • USB 2.0 previously had four wires (power, ground, and a pair for differential data); USB 3.0/USB 3.
Compatibility The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all, while USB 3.0/USB 3.1 Gen 1 specifies new physical connections and thus new cables to take advantage of the higher speed capability of the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same location as before.
Key Features of Thunderbolt 3 over USB Type-C 1 Thunderbolt, USB, DisplayPort and power on USB Type-C on a single cable (features vary between different products) 2 USB Type-C connector and cables which are compact and reversible 3 Supports Thunderbolt Networking (*varies between different products) 4 Supports up to 4K displays 5 Up to 40 Gbps NOTE: Data transfer speed may vary between different devices. Thunderbolt Icons Figure 2.
• Content Type - Real-time signaling of content types between display and source devices, enabling a TV to optimize picture settings based on content type • Additional Color Spaces - Adds support for additional color models used in digital photography and computer graphics • 4K Support - Enables video resolutions far beyond 1080p, supporting next-generation displays that will rival the Digital Cinema systems used in many commercial movie theaters • HDMI Micro Connector - A new, smaller connector for
4 System specifications System specifications Feature Specification Chipset Intel KabyLake U & R (integrated with processor) DRAM bus width 64-bit Flash EPROM SPI 128 Mbits PCIe bus 100 MHz External Bus Frequency DMI 3.
Feature Specification NOTE: Supports one VGA, DisplayPort, HDMI through the docking station .
Feature Specification Coin cell battery 3 V CR2032 lithium coin cell AC adapter specifications Feature Specification Type 65 W or 90 W 65W E5 for India NOTE: The system is shipped with 65 W adapter and also supports 90 W adapter for fast charging. Input voltage 100 V AC to 240 V AC Input current— maximum 1.7 A / 1.6 A Input frequency 50 Hz to 60 Hz Output current 3.34 A (continuous) and 4.62 A (continuous) Rated output voltage 19.5 V DC Weight 0.23 kg, 0.51 lbs (65W) and 0.32 kg, 0.
Feature Specification Network adapter One RJ-45 connector USB • One DisplayPort over USB Type-C (optional Thunderbolt 3) • Type-C USB 3.1 Gen 1 Display port (optional Thunderbolt) • Two USB 3.1 Gen1 ports - (one PowerShare capable) Memory card reader MicroSD 4.0 card reader and One 3042, One 2280 M.
Imaging Rate Up to 30 frames per second Up to 30 frames per second Up to 30 frames per second Display Table 4. 13.3" (16:9) AG FHD WLED 300 nits eDP 1.3 WVA Feature Specification Type FHD Anti-Glare Luminance (typical) 300 nits Dimensions (Active Area) • • • Height: 165.08 mm Width: 293.47 mm Diagonal: 13.3 inch Native Resolution 1920 x 1080 Megapixels 2.
Dimensions and Weight Table 6. Dimensions Dimensions Inches Millimeter Width 12.00 304.80 Depth 8.19 207.95 Height (front, full ) for NT FHD and Touch FHD 0.64 16.33 Height (rear, full) for all configurations 0.66 16.86 Pounds Kilograms 2.59 1.17 Table 7.
5 System setup System setup enables you to manage your tablet hardware and specify BIOS level options.
Keys Navigation Spacebar Expands or collapses a drop‐down list, if applicable. Tab Moves to the next focus area. NOTE: For the standard graphics browser only. Esc Moves to the previous page until you view the main screen. Pressing Esc in the main screen displays a message that prompts you to save any unsaved changes and restarts the system. System setup options NOTE: Depending on the tablet and its installed devices, the items listed in this section may or may not appear.
Option Description • Always • Never NOTE: These options have no relevance if the Admin password is not set BIOS settings. Date/Time Allows you to change the date and time. Video screen options Option Description LCD Brightness Allows you to set the display brightness depending up on the power source (On Battery and On AC). NOTE: The video setting will be visible only when a video card is installed into the system.
Option Description Non-Admin Setup Changes Allows you to determine whether changes to the setup options are allowed when an administrator password is set. If disabled the setup options are locked by the admin password. UEFI Capsule Firmware Updates This option controls whether the system allows BIOS updates via UEFI capsule update packages. Enable UEFI Capsule Firmware Updates option is selected by default.
Option Description Enable Master Password Lockout This option is not selected by default. SSM Security Mitigation Allows you to enable or disable additional UEFI SMM Security Mitigation protections. The OS can use the feature to help protect the secure environment created by virtualization based security. SSM Security Mitigation This option is disabled by default. Secure Boot Option Description Secure Boot Enable This option enables or disables the Secure Boot feature.
Performance screen options Option Description Multi Core Support This field specifies whether the process has one or all cores enabled. The performance of some applications improves with the additional cores. This option is enabled by default. Allows you to enable or disable multi-core support for the processor. Intel SpeedStep • AllThis option is enabled by default. • 1 • 2 • 3 Allows you to enable or disable the Intel SpeedStep mode of the processor.
Option USB Wake Support Description • Weekdays • Select Days Allows you to enable USB devices to wake the system from Standby. NOTE: This feature is only functional when the AC power adapter is connected. If the AC power adapter is removed during Standby, the system setup removes power from all the USB ports to conserve battery power. Wireless Radio Control • Enable USB Wake Support • Wake on Dell USB-C Dock The option is selected by default.
Option Description Type-C Connector Power Allows you to set the maximum power the computer can drawn from the Type-C connectors. The options are: 7.5 Watts 15 WattsThis option is enabled by default. POST Behavior Option Description Adapter Warnings Allows you to enable or disable the system setup (BIOS) warning messages when you use certain power adapters. Enable Adapter Warnings This option is selected by default.
Option Description Prompt on Warnings and Errors. This option is enabled by default. Continue on Warnings Continue on Warnings and Errors MAC Address Pass- Allows you to replace the external NIC MAC address in a supported dock or dongle with the selected MAC address Through from the system. The options are: System Unique MAC Address. This option is enabled by default.
Option Description • WWAN • GPS (on WWAN Module) • WLAN • Bluetooth All the options are enabled by default. NOTE: For WLAN and WiGig enable or disable controls are tied together and they cannot be enabled or disabled independently. Wireless Device Enable Allows you to enable or disable the internal wireless devices. • WWAN/GPS • WLAN • Bluetooth All the options are enabled by default. Maintenance Option Description Service Tag Displays the Service Tag of your computer.
6 Software This chapter details the supported operating systems along with instructions on how to install the drivers. Topics: • Supported operating systems • Downloading drivers Supported operating systems Table 8. Operating systems Windows Other OS media support • • Microsoft Windows 10 Pro 64 bit Microsoft Windows 10 Home 64 bit • Ubuntu • • Dell.com/support to download eligible Windows OS USB media available as upsell Downloading drivers 1 Turn on the notebook. 2 Go to Dell.com/support.
• Intel serial IO driver • Intel Thunderbolt(TM) Controller driver • Management Engine • Realtek PCI-E memory card ControlVault drivers Verify if the ControlVault Device drivers are already installed in the computer. Human Interface Devices drivers Verify if the Human Interface Devices drivers are already installed in the computer. Network drivers Install the WLAN and Bluetooth drivers from the Dell support site. Verify if the Network drivers are already installed in the computer.
Audio drivers Verify if the Realtek Audio drivers are already installed in the computer. Disk drives Verify if the Disk drives drivers are already installed in the computer. Dynamic Platform and Thermal Framework Driver Verify if the Dynamic Platform and Thermal Framework Driver are already installed in the computer.
Management Engine Interface Verify if the Intel Management Engine Interface drivers are already installed in the computer. Serial IO driver Verify if the drivers for Touchpad, and Portable Device are installed. Figure 3.
USB drivers Verify if the USB drivers are already installed in the laptop. Security drivers This section lists the security devices in the Device Manager. Security device drivers Verify if the security device drivers are installed in the computer.
Fingerprint sensor drivers Verify if the Fingerprint sensor drivers are installed in the computer.
7 Troubleshooting Dell Enhanced Pre-Boot System Assessment — ePSA diagnostic 3.0 You can invoke the ePSA diagnostics by performing either of the following steps: • Press the F12 key when the system boots and choosing Diagnostics option. • Press Fn+PWR when the system boots. For more details, see Dell EPSA Diagnostic 3.0. Diagnostic LED This section details the diagnostic features of the battery LED in a notebook. Instead of beep codes errors are indicated via the bicolor Battery Charge LED.
Real Time Clock reset The Real Time Clock (RTC) reset function allows you or the service technician to recover the recently launched model Dell Latitude and Precision systems from select No POST/No Boot/No Power situations. You can initiate the RTC reset on the system from a power off state only if it is connected to AC power. Press and hold the power button for 25 seconds. The system RTC reset occurs after you release the power button.
8 Contacting Dell NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product catalog. Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues: 1 Go to Dell.com/support. 2 Select your support category.
