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Acer Aspire 3935 Service Guide
65
Performing a BIOS Recovery
1.
Shut down the BIOS failed-computer.
2.
Connect the USB storage device containing the BIOS recovery crisis disk files to the failed computer.
3.
Press and hold
<Fn>
+
<Esc>
keys (this is the BIOS recovery hotkey), then press the power button.
The system will now execute the BIOS recovery process. When the process is complete the computer will
automatically reboot.
4.
Disconnect the USB storage device from the computer.
5.
Perform a BIOS flash procedure to update the BIOS firmware.
POST Error Indicators
When a system error is detected during POST (Power On Self Text), the Setup Utility will switch to diagnostic
mode and will either:
•
Displays a POST error message, or
•
Emits a series of beep codes
POST Error Messages
POST error messages tell users what failure the system has detected. Some error messages could be related
to a hardware device. Others may indicate a problem with a device configuration. In some cases an error
message may include recommendations for troubleshooting or require that you press the
Enter
key to display
recommendations. Follow the instructions on the screen. It is recommended that you correct the error before
proceeding, even if the computer appears to boot successfully.
The table below lists the messages that the BIOS has defined and can display.
If your system displays one of the messages marked below with an asterisk (*), write down the code and
message and contact your Acer service provider.
IMPORTANT:
If your system fails after you make changes in the Setup menus, reboot the computer, enter
Setup again and load Setup defaults to correct the error.
Error Messages
Check or do the following in sequence:
Stuck Key
See “Keyboard or Auxiliary Input Device Check” section on
page 71.
System CMOS checksum bad - Default
configuration used
RTC battery
Run the BIOS Setup Utility to reconfigure the system time,
then reboot system.
Real time clock error
RTC battery
Run the BIOS Setup Utility to reconfigure system time, then
reboot system.
Mainboard
Previous boot incomplete - Default
configuration used
Select “Load Setup Defaults” in the BIOS Setup Utility’s Exit
menu.
RTC battery
Mainboard
Invalid System Configuration Data
Select “Load Setup Defaults” in the BIOS Setup Utility’s Exit
menu.
Mainboard
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