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Table 8-8
System diagnostics failure codes and actions to address the failure (continued)
Test description
BIOS Application
CMOS Recovery
Battery Check
Wireless Modules
Fan
Resolve the issue
8. Hard reset
A hard reset (or forced reset) erases all information in the computer's memory and may restore functionality.
Resetting the computer forces the system to clear and reestablish the connections between the BIOS and the
hardware. For more information, see http://support.hp.com/us-en/document/c01684768.
Performing a hard reset might fix the following common conditions:
●
Windows stops responding.
●
Computer stops before Windows loads, indicated by incomplete boot-up, blinking cursor on a black
background, and errors relating to operating system not found or a missing drive.
●
Display suddenly goes blank and stays blank.
●
Software freezes.
●
Keyboard stops responding.
●
The computer does not exit Sleep or Suspend state.
●
An external device stops responding. Turn off the power to that device in addition to performing the
steps in this document.
Before performing a hard reset, you must disconnect or remove all peripheral devices. You should start and
test the computer by itself, and if the problem is not resolved, reconnect one peripheral device at a time. To
resolve the startup or operational problem, run HP Support Assistant, or manually install all updated drivers
from Microsoft and HP.
Error
Failure description
code
BIOS Application Error
501
CMOS Recovery Occurred
502
Primary Battery Replace
601
Not installed or responding
701
Fan not operating correctly
90B
Suggested user actions
The BIOS installation may have become corrupted. Download the
latest version of the BIOS and install it.
If reinstalling the BIOS fails, contact support for further
assistance.
This message indicates that CMOS recovery was completed
successfully. No further action is required.
This message indicates that the primary battery has very low
capacity. Search for support documentation at
http://www.hp.com/support
for details on using the HP Support
Assistant to verify the battery capacity and, if necessary, order a
replacement.
Reseat the wireless LAN adapter module and antennas.
Because seating or reseating a wireless LAN adapter is unique to
each computer model, see the WLAN module removal section in
the removal and replacement chapter for further details.
Contact support if third-party wireless adapters are installed in
the computer.
The system fan may be malfunctioning. Replace the fan.
General troubleshooting steps
91
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Table of Contents
Troubleshooting
