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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 SA
T
A
devices)
BIOS setup module in progress.
Reporting BIOS check errors.
W
aiting 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 SA
T
A
or P
A
T
A
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 P
A
T
A
/ SA
T
A
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
*
R
emove and reinstall the graphics
card.
