C
1 4 6
Debug LED POST and Troubleshooting
POST (hex)
C1
C3/C5
CF
E0
Debug Code Action
00
-> C0
-> Stopped at
C1
(00
-> C0
-> C1
->
Reset
-> Looping)
C0
-> C1
-> Stopped at
C3/C5
(C0
-> C1
-> C3
->
Reset
-> Looping)
Shutdown
-> Stopped at
CF
(Shutdown
-> CF
-> Reset)
C0
-> C1
-> Stopped at
E0
BIOS Program Definition
Detecting memory
.
Detecting DRAM size and type.
ECC auto-detection of L2 cache.
Expanding compressed BIOS code to
the DRAM.
Resume on S1/S3 failed.
E0-EF Definition: Initializing PCIE
device check code.
Possible Cause
1
.
Incompatible memory modules.
2
.
Overclocking issue (tight DRAM
timing).
3
.
One of the memory modules is
defective.
1
.
Tight DRAM timing (system is
unstable).
2
.
Insufficient DRAM voltage.
3
.
Overclocking issue.
1
.
Insufficient DRAM voltage.
2
.
Incompatible memory modules.
3
.
Overclocking issue (tight DRAM
timing).
4
.
BIOS issue.
1
.
Mixed-up BIOS data.
2
.
Incompatible PCI devices.
Solution
1
.
Remove and reinstall the memory
modules.
2
.
Clear the CMOS then load the
default speed.
3
.
T
ry installing a single module only
.
1
.
Clear the CMOS then load the
default speed.
2
.
Increase the DRAM’s voltage.
3
.
Remove and reinstall the memory
modules.
1
.
Increase the DRAM’s voltage.
2
.
Remove and reinstall the memory
modules.
3
.
Load the default DRAM speed.
4
.
Upgrade to the latest BIOS.
1
.
Clear the CMOS data.
2
.
Remove and reinstall the PCI
device.
