Check the power supply voltages. See
. If the voltages are correct, return here and continue with the following steps.
Power-off the computer.
Remove or disconnect the following, one at a time:
External devices (modem, printer, or mouse)
Before removing or replacing memory modules, see
'System Board Memory'
Extended video memory
External Cache RAM
Hard disk drive
Power-on the computer to re-test the system.
Repeat steps 1 through 3 until you find the failing device or adapter.
If all devices and adapters have been removed, and the problem continues, replace the system board. See
'System Board Replacement (Type 8639)'
Please see the
Feel free - send a
for any BUG on this page found - Thank you.