Beeps | Meaning |
---|---|
1 short beep | Normal POST – system is OK |
2 short beeps | POST error – error code shown on screen |
No beep | Power supply, system board problem, disconnected CPU, or disconnected speaker |
Continuous beep | Power supply, system board, RAM or keyboard problem |
Repeating short beeps | Power supply, system board or keyboard problem |
1 long, 1 short beep | System board problem |
1 long, 2 short beeps | Display adapter problem (MDA, CGA) |
1 long, 3 short beeps | Enhanced Graphics Adapter problem (EGA) |
3 long beeps | 3270 keyboard card error |
Beeps | Meaning |
---|---|
1 | Memory refresh timer error |
2 | Parity error in base memory (first 64 KiB block) |
3 | Base memory read/write test error |
4 | Motherboard timer not operational (check all PSU to MB connectors seated) |
5 | Processor failure |
6 | 8042 Gate A20 test error (cannot switch to protected mode) |
7 | General exception error (processor exception interrupt error) |
8 | Display memory error (system video adapter) |
9 | AMI BIOS ROM checksum fix |
10 | CMOS shutdown register read/write fix |
11 | Cache memory test failed |
continuous beeping | Motherboard does not detect a RAM module (continuous beeping) |
Beeps | Meaning |
---|---|
Steady, short beeps | Power supply may be bad |
Long continuous beep tone | Memory failure |
Steady, long beeps | Power supply bad |
No beep | Power supply bad, system not plugged in, or power not turned on |
No beep | If everything seems to be functioning correctly there may be a problem with the 'beeper' itself. The system will normally beep one short beep. |
One long, two short beeps | Video card failure |
Code | Meaning |
---|---|
100–199 | System boards |
200–299 | Memory |
300–399 | Keyboard |
400–499 | Monochrome display |
500–599 | Color/graphics display |
600–699 | Floppy-disk drive or adapter |
700–799 | Math coprocessor |
900–999 | Parallel printer port |
1000–1099 | Alternate printer adapter |
1100–1299 | Asynchronous communication device, adapter, or port |
1300–1399 | Game port |
1400–1499 | Color/graphics printer |
1500–1599 | Synchronous communication device, adapter, or port |
1700–1799 | Hard drive or adapter (or both) |
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-inch disk drive |
8900–8999 | MIDI adapter |
11200–11299 | SCSI adapter |
21000–21099 | SCSI fixed disk and controller |
21500–21599 | SCSI CD-ROM system |
Beeps | Meaning |
---|---|
1 | No RAM installed/detected |
2 | Incompatible RAM type installed (for example, EDO) |
3 | No RAM banks passed memory testing |
4 | Bad checksum for the remainder of the boot ROM |
5 | Bad checksum for the ROM boot block |
Beeps | Meaning |
---|---|
1 | No RAM installed/detected |
2 | Incompatible RAM types |
3 | No good banks |
4 | No good boot images in the boot ROM, bad sys config block, or both |
5 | Processor is not usable |
Tones | Meaning |
---|---|
One tone, repeating every five seconds | No RAM installed/detected |
Three successive tones followed by a repeating five-second pause | Incompatible RAM types |
One long tone while the power button is held down | EFI ROM update in progress |
Three long tones, three short tones, three long tones | EFI ROM corruption detected, ROM recovery in process |
Color | Meaning | |
---|---|---|
Red | Bad ROM[6] | |
Yellow | CPU Exception Before Bootstrap Code is Loaded[6] | |
Green | Bad Chip RAM or fail of Agnus Chip (check seating of Agnus) | |
Black | No CPU | |
White | Expansion passed test successfully | |
Grey | Turn on | |
Constant white | Failure of CPU | |
Purple | Return from InitCode()[6] |
Color | Meaning | |
---|---|---|
Red | ROM Error - Reset or replace | |
Green | CHIP RAM error (reset AGNUS and re-test) | |
Blue | Custom Chip(s) Error | |
Yellow | 68000 detected error before software trapped it (GURU) |
Blinks | Meaning |
---|---|
1 | ROM checksum failure |
2 | RAM test failed |
3 | Watchdog timer failed |
4 | A shortcut exists between two row lines or one of the seven special keys (not implemented) |