AOpen AX6BC User Manual page 94

Troubleshooting
No display.
a. Check all jumper settings to make sure that you have set the proper
jumpers, especially those for CPU type, single/dual voltage (P54C/MMX),
CPU frequency and ratio.
b. Check the power cord or power switch of your system. The simple way to
identify power failure is to check the CPU fan and the power supply fan. If
these are not working, then the power is down.
c. Is there a short on the motherboard? (Is the fan of the power supply
working properly?)
d. Turn off the power and remove all add-on cards, IDE cables and floppy
cables from your mainboard. Only install the VGA card to simplify the
problem.
e. If you use a PCI VGA card, reinstall it to other PCI slot or try another card.
f. Check if the memory (SIMM/DIMM) were installed properly. Reinstall the
SIMM/DIMM to other socket or try another SIMM/DIMM.
g. Make sure the flat cable matches pin1 of IDE connector and your IDE
device.
There is display, but can 't enter BIOS Setup.
a. For checking if the keyboard works properly, press the <Num Lock> key
to enable/disable the Num Lock function, and check if the LED will ON
and OFF accordingly.
b. Check if Turbo Switch was released, don 't use Turbo Switch before
system boots. (In fact, there is no Turbo function after Pentium machine.
Now Turbo Switch usually acts as Suspend Switch.)
System sometimes auto reboots.
a. Clear CMOS. BIOS will load default setting, use the slowest and most
reliable setting.
b. Repeat the steps in "No display" section carefully.
B-2