Maintenance and Service Guide
Table Of Contents
- Computer features
- Illustrated parts catalog
- Routine care, SATA drive guidelines, and disassembly preparation
- Removal and replacement procedures
- Preparation for disassembly
- Access panel
- Optical drive
- Hard drive
- Front bezel
- Removing the slim bezel blank
- Memory modules (DIMMs)
- Expansion card
- WLAN module
- Serial port
- Hood lock
- Hood sensor
- Fan
- Option board
- Heat sink
- Processor
- Drive cage
- Solid-state drive
- Battery
- USB board
- Card reader
- Speaker
- Power supply
- System board
- Wireless antennas and cables
- Troubleshooting without diagnostics
- Before you call for technical support
- Helpful hints
- Solving general problems
- Cannot access the Computer Setup (F10) Utility when booting the computer
- Computer appears locked up and will not turn off when the power button is pressed
- Computer will not respond to keyboard or mouse
- Computer date and time display is incorrect
- There is no sound or sound volume is too low
- Cannot remove computer cover or access panel
- Poor performance
- Computer powered off automatically and the power light blinks red four times and then white two times
- System does not turn on and the lights on the front of the computer are not blinking
- Solving power problems
- Power supply shuts down intermittently
- Computer turned off automatically, power light blinks red two times followed by a two-second pause, and the computer beeps two times (Beeps stop after fifth iteration but lights continue blinking)
- Power light blinks red four times followed by a two-second pause and the computer beeps four times (Beeps stop after fifth iteration but lights continue blinking)
- Solving hard drive problems
- Solving audio problems
- Solving printer problems
- Solving keyboard and mouse problems
- Solving hardware installation problems
- Solving network problems
- Network driver does not detect network controller
- Network status link light never blinks
- Diagnostics reports a failure
- Diagnostics passes, but the computer does not communicate with the network
- Network controller stopped working when an expansion board was added to the computer
- Network controller stops working without apparent cause
- Cannot connect to network server when attempting remote system installation
- System setup utility reports unprogrammed EEPROM
- Solving memory problems
- System will not boot or does not function properly after installing additional memory modules
- Out of memory error
- Memory count during POST is wrong
- Insufficient memory error during operation.
- Power light blinks red five times followed by a two-second pause and the computer beeps five times (Beeps stop after fifth iteration but lights continue blinking)
- Solving USB flash drive problems
- Solving internet access problems
- Solving software problems
- Computer Setup (F10) Utility
- POST error messages
- Password security and resetting CMOS
- Using HP PC Hardware Diagnostics
- Using HP PC Hardware Diagnostics Windows (select products only)
- Using HP PC Hardware Diagnostics UEFI
- Using Remote HP PC Hardware Diagnostics UEFI settings (select products only)
- Backing up, restoring, and recovering
- Statement of memory volatility
- Power cord set requirements
- Specifications
- Index
Table 7-1 POST numeric codes and text messages (continued)
Control panel message Description Recommended action
801-Keyboard or System Unit Error Keyboard failure. 1. Reconnect the keyboard with
computer turned o.
2. Be sure that none of the keys are
depressed.
3. Replace the keyboard.
4. Replace the system board.
900-CPU Fan Not Detected CPU fan is not connected or may have
malfunctioned.
1. Reseat fan.
2. Reseat fan cable.
3. Replace fan.
901-Chassis, Rear Chassis, Front Chassis,
or PCIe blower Fan not Detected
Fan is not connected or might have
malfunctioned.
1. Reseat fan.
2. Reseat fan cable.
3. Replace fan.
904-SATA Cabling Error One or more SATA devices are improperly
attached. For optimal performance, the
SATA 0 and SATA 1 ports should be used
for hard drives before other ports.
Ensure SATA connectors are used in
ascending order. For one device, use SATA
0. For two devices, use SATA 0 and SATA 1.
For three devices, use SATA 0, SATA 1, and
SATA 2.
90B-Fan Failure The system has detected that a cooling fan
is not operating correctly.
1. Reseat fan.
2. Reseat fan.cable.
3. Replace fan.
90D-System Temperature Thermal shutdown occurred. The system
BIOS has detected your machine was
previously shut down to avoid overheating.
Overheating may occur if the cooling vents
are blocked or the operating temperature
exceeds the system specications. The
machine should return to normal operation
once the situation is resolved.
Make sure system has proper airow.
90E-Power Supply Fan Not detected Power supply fan is not connected or may
have malfunctioned.
1. Reseat power supply fan.
2. Reseat fan cable.
3. Replace power supply fan.
910–Filter Warning Airow lter is dirty. Replace the airow lter.
911–Graphics Module Fan Not Detected Graphics card fan is not connected or might
have malfunctioned.
1. Reseat graphics card fan.
2. Reseat fan cable.
3. Replace graphics card fan.
912–Incorrect CPU cooler installed for this
conguration
The processor cooler/heat sink does not
match processor power requirement.
Replace the cooler/heat sink to match the
processor power requirement.
88 Chapter 7 POST error messages