Table of Contents
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Table 6-6
System diagnostics failure codes and user actions (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.
Before beginning, turn the computer over and look for a battery compartment door (service door). For 2015
platforms, the battery is considered removable but not accessible. See the battery section for how to remove/
unplug the battery.
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Chapter 6 Troubleshooting guide
Failure description
Error 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.
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Troubleshooting
