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Table 22.
POST Codes (continued)
Diagnostic LED Decoder
Post
G=Green, R=Red, A=Amber
Code
MSB
2Bh
G
Off
2Dh
G
G
2Dh
G
G
30h
Off
Off
30h
Off
Off
2Eh
R
R
37h
Off
G
37h
Off
G
37h
Off
G
38h
G
Off
34h
Off
G
39h
G
Off
3Ah
G
Off
40h
Off
R
4Bh
G
R
57h
Off
A
53h
Off
R
54h
Off
A
60h
Off
R
65h
Off
A
7Fh
G
A
80h
R
Off
81h
R
Off
xSeries 343 Product Guide
Description
LSB
A
G
Platform hook.
R
G
Initialize AMI display manager Module. Initialize support code for
headless system if no video controller is detected.
R
G
Scan flash for logos and Initialize logo data areas.
R
R
Detect PS/2 Mouse.
R
R
Hook after c000 ROM control.
A
Off
Set up video parameters in BIOS data area.
A
A
Activate ADM: The display mode is set. Displaying the power-on
message next.
A
A
Initialize language module. Display splash logo.
A
A
Display Sign on message, BIOS ID and processor information.
R
R
Detect USB Mouse: Initializing the bus input, and general devices
next, if present.
R
R
Reset IDE Controllers.
R
A
Displaying bus initialization error messages.
A
R
Display Setup Message: The new cursor position has been read
and saved. Displaying the Hit Setup message next.
Off
Off
Ensure Timer Keyboard Interrupts are on.
G
G
Memory Test: The amount of memory above 8 MB has been found
and verified. Checking for a soft reset and clearing the memory
below 8 MB for the soft reset next. If this is a power-on situation,
going to checkpoint 4Eh next.
G
A
Chipset hook after memory size.
A
A
Display processor cache size.
Off
R
Disable parity and NMI reporting.
R
Off
Test 8237 DMA Controller: The DMA page register test passed.
Performing the DMA Controller 1 base register test next.
R
G
Init 8237 DMA Controller: The DMA controller 2 base register test
passed. Programming DMA controllers 1 and 2 next.
A
A
Extended NMI enable: Extended NMI source enabling is in
progress.
Off
Off
Enable Mouse and Keyboard: The keyboard test has started.
Clearing the output buffer and checking for stuck keys. Issuing the
keyboard reset command next.
Off
G
Keyboard Interface Test: A keyboard reset error or stuck key was
found. Issuing the keyboard controller interface test command
next.
continued
71
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