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Debug LED POST and Troubleshooting
POST (hex)
75
7F
FF
Debug Code Action
Power on
-
> Stopped at 75
Power on
-
> Stopped at 7F
* Checksum error always
appear after the BIOS default
has been loaded.
Power on
-
> Run to FF
* Blank Screen
BIOS Program Definition
Initializing storage devices.
(Probing for IDE devices or SATA
devices)
BIOS setup module in progress.
Reporting BIOS check errors.
Waiting for keys:
DEL key to load the BIOS default.
F1 key to continue.
Boot attempt (INT 19h)
System booted normally.
Possible Cause
1. Lost power source of some devices.
2. Incompatible SATA or PATA
device.
3. CD-ROM’s spin took too long.
1. Checksum error occured.
(Change/add devices such as CPU/
DRAM)
2. Error occured after clearing the
CMOS.
3. Onboard battery is depleted.
4. Overclocking issue.
* The battery circuit of the MB is
defective.
Normal Operation
* The graphics card was not
connected properly or it is defective.
Solution
1. Inspect the power cable connection.
2. Inspect the IDE cable connection or
replace another PATA/ SATA device.
3. Remove the disc, if present, from the
CD-ROM device.
1. Load the optimized default setting
of the BIOS.
2. Alter or adjust the BIOS setting.
3. Replace a new battery.
4. Decrease the overclock range.
* RMA action required.
Nil
* Remove and reinstall the graphics
card.