Motherboard debug codes list

IBM POST  Diagnostic Code Descriptions (debug code motherboard )

code	Problem
100 - 199	System Board
200 - 299	Memory
300 - 399	Keyboard
400 - 499	Monochrome Display
500 - 599	Color/Graphics Display
600 - 699	Floppy-disk drive and/or Adapter
700 - 799	Math Coprocessor
900 - 999	Parallel Printer Port
1000 - 1099	Alternate Printer Adapter
1100 - 1299	Asynchrones Communication Devise, Adapter, or Port
1300 - 1399	Game Port
1400 - 1499	Color/Graphics Printer
1500 - 1599	Synchrones Communication Devise, Adapter, or Port
1700 - 1799	Hard Drive and/or Adapter
1800 - 1899	Expansion Unit (XT)
2000 - 2199	Bisynchronous Communication Adapter
2400 - 2599	EGA system-board Video (MCA)
3000 - 3199	LAN Adapter
4800 - 4999	Internal Modem
7000 - 7099	Phoenix BIOS Chips
7300 - 7399	3.5" Disk Drive
8900 - 8999	MIDI Adapter
11200 - 11299	SCSI Adapter
21000 - 21099	SCSI Fixed Disk and Controller
21500 - 21599	SCSI CD-ROM System

Phoenix Code Description (debug code motherboard)

Code	Problem
1-1-3	CMOS read/write failure
1-1-4	ROM BIOS checksum error
1-2-1	Programmable interval timer failure
1-2-2	DMA initialization failure
1-2-3	DMA page register read/write failure
1-3-1	RAM refresh verification failure
1-3-3	First 64k RAM chip or data line failure
1-3-4	First 64k RAM odd/even logic failure
1-4-1	Address line failure first 64k RAM
1-4-2	Parity failure first 64k RAM
2-_-_	Faulty Memory
3-1-_	Faulty Motherboard
3-2-4	Keyboard controller Test failure
3-3-4	Screen initialization failure
3-4-1	Screen retrace test failure
3-4-2	Search for video ROM in progress
4-2-1	Timer tick interrupt in progress or failure
4-2-2	Shutdown test in progress or failure
4-2-3	Gate A20 failure
4-2-4	Unexpected interrupt in protected mode
4-3-1	RAM test in progress or failure>ffffh
4-3-2	Faulty Motherboard
4-3-3	Interval timer channel 2 test or failure
4-3-4	Time of Day clock test failure
4-4-1	Serial port test or failure
4-4-2	Parallel port test or failure
4-4-3	Math coprocessor test or failure
Low 1-1-2	System Board select failure
Low 1-1-3	Extended CMOS RAM failure

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