Chromebook 11 3189 Disassembly and Reassembly Guide - For use by Dell Certified Technicians only Regulatory Model: P26T Regulatory Type: P26T001
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. © 2017 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries.
Contents 1 Working on your computer............................................................................................................................. 5 Safety instructions............................................................................................................................................................. 5 Before working inside your computer..............................................................................................................................
Palm rest............................................................................................................................................................................ 31 Replacing palm rest.................................................................................................................................................... 31 3 Product specification...................................................................................................................................
1 Working on your computer Safety instructions Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure included in this document assumes that the following conditions exist: • You have read the safety information that shipped with your computer. • A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.
11 Press and hold the power button for few seconds, to ground the system board. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the display. CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal components.
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 • Plastic scribe microSD card Removing microSD card 1 Follow the procedure in Before working inside your computer. 2 Press in on the microSD card to release it from the computer. 3 Remove the microSD card from the computer.
c Pry the base cover from the edge. NOTE: You may need a 3c plastic scribe to pry the base cover from the edge. 4 Lift the base cover away from the computer.
Installing base cover 1 Toe in the base cover front edge into the system. 2 Press the edges of the cover until it clicks into place. 3 Replace the M2.5x7 screws to secure the base cover to the computer. 4 Install the microSD card 5 Follow the procedure in After working inside your computer. Battery Removing battery 1 Follow the procedure in Before working inside your computer.
Installing battery 1 Insert the battery into the slot on the computer. 2 Connect the battery cable to the connector on the battery. 3 Replace the M2.0x3.0 screws to secure the battery to the computer. 4 Install the: a b 5 base cover microSD card Follow the procedure in After working inside your computer. Keyboard Removing keyboard 1 Follow the procedure in Before working inside your computer.
NOTE: The two release holes for the keyboard are indicated by the "KB" labeling. 4 Slide the keyboard outwards, away from the computer.
NOTE: Carefully pull the keyboard connector through the gap in the palm rest. 5 12 Lift the keyboard away from the computer.
Installing keyboard 1 Align the keyboard trim with the tabs on the computer, and press it until it clicks into place. 2 Connect the keyboard cable on the system board.
3 Install the: a b c 4 battery base cover microSD card Follow the procedure in After working inside your computer. Power switch board Removing power switch board 1 Follow the procedure in Before working inside your computer. 2 Remove the: a b c 3 To remove the power switch: a b c 14 microSD card base cover battery Disconnect the power switch cable from the power switch board [1]. Remove the M.2.0x3.0 screws that secure the power switch board on the computer [2].
Installing power switch board 1 Align the screw hole on the power switch board into the slot on the computer. 2 Replace the M2.0x3.0 screws that secure the power switch board to the computer. 3 Connect the power switch cable to the connector on the power switch board. 4 Install the: a b c 5 battery base cover microSD card Follow the procedure in After working inside your computer. Audio board Removing audio board 1 Follow the procedure in Before working inside your computer.
Installing audio board 1 Insert the audio board into the slot on the computer. 2 Replace the M2.0x3.0 screw that secure the audio board to the computer. 3 Connect the audio cable to the connector on the audio board. 4 Install the: a b c 5 battery base cover microSD card Follow the procedure in After working inside your computer. Power connector port Removing power connector port 1 Follow the procedure in Before working inside your computer.
3 To remove the power connector port: a b c Disconnect the power connector cable from the connector on the system board [1]. Remove the M.2.0x3.0 screws that secure the power connector port on the computer [2]. Slide and lift the power connector port away from the computer [3]. Installing power connector port 1 Insert the power connector port into the slot on the computer. 2 Replace the M2.0x3.0 screw that secures the power connector port to the computer.
Speaker Removing speaker 1 Follow the procedure in Before working inside your computer. 2 Remove the: a b c 3 To remove the speaker: a b c 4 18 microSD card base cover battery Disconnect the speaker cable from the connector on the system board [1]. Remove the adhesive tape that secures the speaker cable on the computer . Unroute the speaker cable from the routing channel [3]. Remove the speaker from the computer.
Installing speakers 1 Place the speakers into the slots on the computer. 2 Route the speaker cable through the retention clips through routing channel. 3 Affix the adhesive tape to secure the speaker cable on the computer. 4 Connect the speaker cable to the connector on the system board. 5 Install the: a b c 6 battery base cover microSD card Follow the procedure in After working inside your computer.
4 Remove the screws (M2.0x3.0, M.2.0x2.0) that secure the metal bracket to the touchpad on the computer. NOTE: Remove the adhesive tape that secures the speaker cable on the metal bracket. 5 To remove metal bracket: a b 20 Remove the adhesive tape [1, 2]. Lift the metal bracket [3].
6 Remove the touchpad from the computer.
Installing touchpad 1 Place the touchpad into the slots on the computer. 2 Place the metal bracket, and affix the adhesive tape. 3 Replace the screws (M2.0x3.0, M.2.0x2.0) that secure the metal bracket on the computer. NOTE: Affix the adhesive tape that secures the speaker cable on the metal bracket. 4 Connect the touchpad cable. 5 Affix the adhesive tape to secure the speaker cable on the computer. 6 Connect the speaker cable to the connector on the system board.
4 Disconnect the sensor cable, and turn over the computer [1, 2] Removing and installing components 23
5 To remove display assembly: a b 24 Remove the display hinge screws M2.0xM5.0 that secure the display assembly to the computer [1]. Lift the display assembly away from the computer [2].
Installing display assembly 1 Place the display assembly to align with the screw holders on the computer. 2 Replace the screws that secure the display hinges to the palm-rest assembly. 3 Flip over the computer and connect the sensor cable on the system board. 4 Connect the display cable to the connector on the system board. 5 Place the metal bracket over the (display cable) connector, and tighten the M2.0x3.0 screws to secure the display cable to the computer. 6 Connect the WLAN cables.
Removing display back cover 1 Follow the procedure in Before working inside your computer. 2 Using the plastic scribe pry the edges of the display back cover. 3 Remove the display back cover away from the computer.
Installing display back cover 1 Align the display back cover with the tabs on the computer, and press it until it clicks into place. 2 Follow the procedure in After working inside your computer. System board Removing system board 1 Follow the procedure in Before working inside your computer.
5 To remove the metal bracket (WLAN and display cable): a b c d 28 Remove the M2.0x3.0 screw and lift the metal bracket that secures the WLAN card on the system board [1, 2] Disconnect the WLAN cables [3]. Remove the screws M2.0x.
6 To remove the system board: a b Remove the screws that secure the system board on the palm rest assembly [1]. Lift the system board off the palm- rest assembly [2].
Installing system board 1 Align the system board with the screw holders on the computer. 2 Tighten the M2.0x3.0 screws to secure the system board to the computer. 3 Connect the display cable to the connector. 4 Place the metal bracket over the connector and tighten the M2.0x3.0 screws to secure the display cable to the computer. 5 Connect the WLAN cables. 6 Place the metal bracket, and tighten the M2.0x3.0 screw to the WLAN cable on the system board. 7 Place the metal and tighten M2.0x3.
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 microSD card base cover battery keyboard power switch board audio power connector speaker touchpad display assembly system board NOTE: The component you are left with is the palm rest.
h i j k 4 32 keyboard battery base cover microSD card Follow the procedure in After working inside your computer.
3 Product specification This section gives information about product specifications. Table 1. Chrome 11 (3189) Product specification Features Processor Chromebook 11 (3189) • • Intel Celeron Processor N3060 (6 W, 2 M cache, up to 2.48 GHz) Intel Pentium N3710 (Quad Core, 1.
Features Chromebook 11 (3189) Warranty • • • • DC-IN (7.4 mm) LEDs microSD card reader Noble wedge lock slot • • • • 1 year onsite repair/service ProSupport with NBD Onsite Premium Phone Support In-Home 1-4 years warranty extension options.
4 Software This section provides information about the operating system, commands, and bundled software for Dell Chromebook 11 (3189). Topics: • Operating system • View system information • Dell activity light Operating system This page contains information about the operating system used by the Dell Chromebook 11 (3189). Chrome OS Chromebooks are powered by the Google Chrome operating system, based on Google's popular Chrome browser.
• Syncronisability • High power at low cost • Easy to learn and use • Documents, calendar, e-mail, contacts, and tasks available online and offline, and all securely backed-up and synchronised in the cloud. • Access to the Chrome web app store • Killer web apps • The latest Intel Core processors • Fun games • Built-in support for popular file types and external devices For more information about the Chrome OS, please visit the Chrome OS training page.
The Developer Mode switch turns off verified boot (at the Kernel stage) to enable users to run Chromium OS (or other OS). The BIOS is always verified. Disk Partition Map There are two copies of Chrome OS on disk: an active copy and a backup copy. Each copy consists of a kernel partition and a root file system. The backup copy is updated automatically in the background. Users only need to reboot. The partition contains encrypted user data and is also used in the factory for storing test software.
Developer and Recovery mode Table 2. Developer and Recovery mode Developer Mode Recovery Mode • • • • • Used to boot without verification. Can be turned on via key combination during boot. Stateful partition is wiped during transitions. Used in the factory to boot test image. • • Allows a user to reinstall the Chrome OS from a USB key or SD card. Recovery mode is entered if verified boot fails. A user can force recovery mode via a key combination during boot.
Chrome vs Chromium OS Table 3. Difference between Chromium and Chrome OS Difference between Chromium and Chrome OS Chromium OS Chrome OS • • • • Is an open source project: http://www.chromium.org/ chromium-os Runs on regular PCs and Chrome devices • Is based on Chromium OS Only runs on the Chrome devices with required hardware features (TPM, RO firmware, recovery button, developer switch).
Table 4. View system information Commands Action and Purpose Chrome:help View basic OS information. Chrome:settings View information such as screen resolution options (Device>Display settings), touchpad, and other basic hardware information.
Commands Action and Purpose Chrome:system View advanced system information such as the Google Chrome version, BIOS information, CPU information, memory information, network status, power supply information, etc.
Commands Action and Purpose Chrome:netinternals View advanced networking information. Screenshot Dell activity light This page contains all the information about the Dell Bright Light software that is used to control Dell Activity Light. Overview Dell Activity Light can be used as an indicator for the interaction between school teacher and student, and Dell has designed a software over this feature.
Raise your Hand/Answer Question/Discussion buttons Students can either click the on-screen button or press keyboard hot key to on/off the Ask question LED. The on-screen button can be the Chrome application in the menu or the shortcut icon on the task bar.
MultiColor Poll Students can vote with different LED color by either clicking the on-screen button (suggested) or pressing keyboard hot key.
5 Technology and components This chapter details the technology and components available in the systems. Topics: • Keyboard • Touchpad • Integrated microphone • Bluetooth Keyboard Dell Chromebook 11 (3189) keyboards have a few extra features to help you browse the web effortlessly and efficiently. The keyboard contains a dedicated search key and a new row of web shortcut keys. A standard USB Windows keyboard can also be used with the Chromebook, using the same keyboard shortcuts.
Special keys Enter Immersive mode, which hides the tabs and launcher Enter Overview mode, which shows all windows Decrease screen brightness Increase screen brightness Mute Decrease the volume Increase the volume Search applications and the web at the same time. On a Chromebook, this key is on the side, where the Caps Lock key is normally located. Keyboard shortcut keys Table 6.
To see more shortcuts, simply press Ctrl+Alt+? To open the keyboard viewer on your screen. Touchpad This page contains information for Dell Chromebook 11 (3189) touchpad gestures. The following table lists some gestures and actions supported by the Chromebook touchpad: Table 7. Touch pad gestures Touchpad gestures Gestures Explanation Simply move your finger across the touchpad. Press down on the lower half of the touchpad.
Integrated microphone This page contains all the information about the Dell Chromebook 11 (3189) integrated microphone. Akustica AKU240 is an HD Voice quality, top port, digital output MEMS microphone in a small 4.0 x 3.0 x 1.0 mm package.
these icons, your Chromebook does not support Bluetooth. If your Chromebook supports Bluetooth, it can connect to a wide range of the Bluetooth accessories, including the following: • Keyboards • Mice • Speakers • Headphones • Headsets (audio only) To connect a Bluetooth device with your Chromebook, you need to pair them. Here is how: 1 Sign in to your Chromebook. 2 Click the status area in the lower-right corner, where your account picture appears.
6 Diagnostic and troubleshooting This section covers the diagnostics tool and troubleshooting information for field service technicians. Topics: • Basic troubleshooting • CROSH • CROSH commands • Chrome commands • Commonly used CROSH command • Reset Chromebook • Recovery Chromebook Basic troubleshooting This page contains all the information for Dell Chromebook 11 (3189) basic troubleshooting NOTE: Refer to Google Help Center for the online troubleshooter.
Power issues the Chromebook charge and the light is not coming on, perform a hard reset. 4 5 NOTE: You can perform a hard reset by pressing Refresh + Power. Use a different AC adapter with the same power voltage. Remove the AC adapter, and turn on with the battery power only. Display issue Table 9.
Audio, screen, and camera issues 1 2 3 4 Try adjusting the brightness with the brightness keys at the top of the keyboard. In the status area in the bottom-right of the screen, check the display and make sure there are no issues with a mirrored or extended display. Try rebooting the Chromebook If the screen issues persist, try to Reset or Recover the Chomebook.
Touchpad / Hotkeys issues 4 5 6 If the cursor still does not move when using the touch pad, try logging in from the Guest account using the tab key to navigate. If users experience touch pad issues with the account that is not the owner (primary) account, delete the user account and re-create it. Again, use the tab key to navigate. If none of the above steps work, try to Reset or Recover the Chomebook.
Chrome OS issues 2 3 4 5 6 Disconnect all peripheral devices, and remove all USB devices and media cards. Disconnect the AC adapter. Press and hold the power button for 10 seconds. Reconnect the AC adapter, and turn on the system. If issue persists, please perform a Reset or Recover the Chromebook.
2 Press + + The interface appears as shown in the screenshot below: 3 Type in the CROSH command for diagnostics. Type 'help' for a list of available commands. Type help_advanced to display a complete list of commands for debugging purposes Alternately, refer to CROSH Commands for the list of the CROSH commands available for diagnostics. CROSH commands The table below lists the available commands in Chrome Shell (CROSH). Table 14.
Table 15. Advanced help command Command Purpose battery_test[] Tests the battery discharge rate for a given number of seconds. No argument defaults to a 300 s test. bt_console [] Enters a Bluetooth debugging console. The Optional argument specifies the capability of a pairing agent the console provides; see the Bluetooth Core specification for valid options. chaps_debug [start|stop|] Sets the chaps debug logging level. No arguments will start verbose logging.
Command Purpose storage_test_2 Performs an extensive readability test. syslog Logs a message to system log. tpcontrol{status | taptoclick [on|off] sensitivity [1-5] | set < value>} tpcontrol {syntp [on|off]} Allows the user to manually adjust advanced touchpad settings. tracepath [-n] [/port] Traces the path/route to a network host. update_over_cellular [enable|disable] Enables or disables the auto updates over cellular networks.
Purpose Browser Shortcut Explanation Memory Troubleshooting chrome://memory View running processes and memory utilization Module Load chrome://conflicts Shows conflicts of all modules loaded by Chrome Chrome Sync Status chrome://syncchrome://sync-internals Allows troubleshooting of connected accounts Connectivity Troubleshooting chrome://net-internals Comprehensive network/connectivity diagnostics, including DNS analysis, Waterfall and Bandwidth diagnostics, and so on Histogram chrome://hist
Table 17. Helpful chrome commands Chrome Commands Purpose chrome://flags From here you can enable some of the experimental features that are hidden in the Google Chrome browser. Please note that as mentioned on this page, since these are experimental, these might not work as expected and might cause issues. Enable these features, and use it at your own risk. chrome://dns This displays the list of hostnames for which the browser will prefetch the DNS records.
Chrome Commands Purpose chrome://downloads This is also available from the Menu > Downloads. Shortcut key is Ctrl+J. chrome://extensions This is also available from the Menu > Tools > Extensions. chrome://bookmarks This is also available from the Menu > Bookmarks > Bookmark Manager. Short cut key is Ctrl+Shift+O.
Chrome Commands Purpose chrome://history This is also available from the Menu > History. Short cut key is Ctrl+H. chrome://memory This will redirect to “chrome://memoryredirect/”. This will display the memory used by the Google Chrome browser. This also displays all the process related to browser with their PID, process name, and the memory it takes. chrome://net-internals This displays all networking related information. Use this to capture network events generated by the browser.
Chrome Commands Purpose chrome://quota-internals This gives information about the disk space quote used by the browser, including the breakdown of how much space the individual websites took under temporary files. chrome://sessions This displays the number of sessions and magic list that are currently running. chrome://settings This is also available from the Menu > Options (on Windows), and Menu > Preferences (on Linux). From here you can control various browser related settings.
Chrome Commands Purpose chrome://sync-internals This gives information about the Chrome sync feature, including the Sync URL used by Google, and sync statistics. Screenshot Commonly used CROSH command This page contains information about the most commonly used CROSH commands to diagnose the Dell Chromebook 11 (3189). Below are some of the most commonly used CROSH commands to troubleshoot a hardware issue. NOTE: CROSH storage_test_1 and storage_test_2 are not supported on the eMMC storage device.
5 Type battery_test 1 into CROSH, and then press Enter. 6 Check the result to confirm that the battery is charging. Check battery health Follow the steps to evaluate the health of the Chromebook battery, and check the discharge rate: 1 Disconnect the AC adapter from the Chromebook. 2 Turn on and sign in to Chromebook. 3 Open the Chrome browser.
4 Press CTRL + ALT + T to open CROSH. 5 Type battery_test 1 into CROSH, and then press Enter. 6 A screen displays the current battery health and discharge rate. • • If the Battery health percentage is greater than 50%, the battery is within the expected wear limits. If the Battery health percentage is equal to or less than 50% and the battery is less than a year old, the battery is outside expected wear limits and might need to be replaced.
• If the test results show that Battery is Unknown, the battery might need to be replaced. Checking memory Follow the steps below to perform a memory check for Chromebook: NOTE: This will approximately take 20 minutes to complete the test, and it also depends on the capacity of the memory. 1 Turn on and sign in to Chromebook. 2 Open the Chrome browser. 3 Press CTRL + ALT + T to open CROSH. 4 Type memory_test into CROSH, and then press Enter.
5 A diagnostic screen displays the result of the memory test passed without any errors. Example of a memory test failure.
Checking network status If you are having trouble connecting to the Internet, use the steps in one or more of the following sections to test the network adapter: Follow the instruction to gather the information about the network and diagnose the network errors. 1 Turn on and sign in to Chromebook. 2 Open the Chrome browser. 3 Press CTRL + ALT + T to open CROSH. 4 Type network_diag into CROSH, and then press Enter.
5 Wait while CROSH performs a set of network diagnostic tests. A diagnostic screen displays the results of the network adapter health test. 6 The diagnostic test log is saved as a.txt (plain text) file in the Files app.
7 If the diagnostic test returns a failure message, make sure the Wi-Fi adapter is enabled and connect to a network. Reset Chromebook This page contains all information about resetting Dell Chromebook 11 (3189). All local user data stored on the Chromebook can be cleared by resetting it to its original factory state (also known as Powerwash). This step might be helpful if you want to reset owner permissions or if you are experiencing issues with your user profile.
1 Click the status area in the lower-right corner, where your account picture appears.
2 72 Click Settings as highlighted from the screenshot below.
3 Click Show advanced settings to expand the menu.
4 74 Click the Powerwash button.
5 Click Restart when prompted. You can also reset your Chromebook from the sign-in screen by holding down the keys Ctrl+Alt+Shift+R and clicking Restart. (If you are signed in to your Chromebook, sign out first before you press on Ctrl+Alt+Shift+R, then click Restart. Once the Chromebook is restarted, click Reset.) After you restart the Chromebook, you should now see the setup screen. Follow the instructions on the screen to set up your Chromebook again.
NOTE: All account information and data stored on your Chromebook, such as photos, downloaded files, and saved networks, will be deleted. Owner privileges for your primary account will also be reset. However, the actual Google Accounts and any data synced to these accounts are not affected by the recovery process. After the recovery process is complete, you will be guided through the initial setup again.
Operating System Instructions reinserting your USB drive or SD card. Your USB drive or SD card should now be ready to use for recovery. Create a recovery flash drive by using the Recovery Tool. The tool may not be available in all languages. Linux Instructions 1 2 3 4 1.Click this link to download the Recovery Tool. Modify the script permissions to allow execution with the following command: $ & sudo chmod 755 linux_recovery.
Question Solution 3 If the problem persists, contact Google Chrome support team. An error message You are using an out-of-date Chrome OS recovery image. You should download an up-to date recovery image. Simply follow all the instructions exactly as specified in Step 2 above. You successfully recovered your Chromebook but now you can not use your USB or SD card with Windows After you have completed recovery, you need to format your USB or SD card using the recovery tool.
7 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.
