However, if the computer fails the POST, the computer emits a series of LED codes during the start-up. The system LED is integrated on
the Power button.
The following table shows different light patterns and what they indicate.
Table 4. States Under Host BIOS Control
Amber LED state
Fault Description Faults
Recommendation for Tech Support
1, 1
Bad MBD
BAD MBD – Rows A, G, H, I and J from table
12.4 of SIO Spec- Pre-POST indicators
Make sure PSU stays off when this happen
or it might just be a tripping system. If truly is
the 1-1 blink code, replace MB.
1, 2
Bad MB, PSU or
cabling
Bad MBD, PSU or PSU cabling -Rows B, C and
D of table 12.4 SIO spec
Make sure all PSU cable, control and power
are all connected. Remove PSU and test
BIST button outside of the system first, if
failed, replace PSU. If not, install back the
PSU and test the BIST button again. If failed,
replace motherboard.
1, 3
Bad MBD, DIMMS
or CPU
Bad MBD, DIMMS or CPU- Rows F and K
from table 12.4 of SIO spec
Make sure PSU stays ON when this happen
or it might just be a false alarm. If truly is the
1-3 blink code, replace MB.
2, 1
CPU
CPU failure
Make sure a CPU is installed in primary
socket. Check for CPU gold pad dirt/finger
prints. Try a known good CPU on failing
system. If still cannot resolve issue, replace
motherboard.
2, 2
Motherboard:
BIOS ROM failure
Motherboard, covers BIOS corruption or ROM
error
Power off system and install RTC_RST
jumper. Remove jumper and power back on
to see if issue persist. Make sure system
stays ON and 2-2 code repeats when this
happen or it might just be a false alarm. If
truly is the 2-2 blink code, replace MB.
2, 3
Memory
No Memory/RAM detected
Make sure a supported DIMM is installed. Try
different DIMM slots. Try knonw good DIMM
stick. If still cannot resolve issue, replace
motherboard.
2, 4
Memory
Memory/RAM failure
Make sure a supported DIMM is installed. Try
different DIMM slots. Try knonw good DIMM
stick. If still cannot resolve issue, replace
motherboard.
2, 5
Memory
Invalid memory installed
Make sure a supported DIMM is installed. Try
different DIMM slots. Try knonw good DIMM
stick. If still cannot resolve issue, replace
motherboard.
2, 6
Motherboard:
Chipset
Motherboard / Chipset Error
Power off system and install RTC_RST
jumper. Remove jumper and power back on
to see if issue persist. If yes, power off
system and remove coin cell battery. Install
back battery and power back on to see if
issue persist. If yes, replace motherboard.
3, 2
PCI / Video
PCI or Video card/chip failure
Swap monitor/Video cable/GFX card. Try
GFX card only in slot 2 and slot 4. If not
resolved, replace motherboard.
3, 3
BIOS Recovery 1
Recovery Image not found
Power off system and install RTC_RST
jumper. Remove jumper and power back on
to see if issue persist. If yes, power off
76
Troubleshooting
