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Troubleshooting with BIOS-Beep tones
Troubleshooting with BIOS-Beep tones
If your PC hangs and gives you some nice beeps, you can determine the erroneous hardware:
AMI
AWARD
IBM
MACINTOSH
PHOENIX
| Beepcodes | Error | |
| AMI (long+short beeps) | ||
| 1x short | DRAM refresh failure | |
| 2x short | Parity circuit failure | |
| 3x short | Base 64K RAM failure | |
| 4x short | System timer failure | |
| 5x short | Process failure | |
| 6x short | Keyboard controller Gate A20 error | |
| 7x short | Virtual mode exception error | |
| 8x short | Display memory Read/Write test failure | |
| 9x short | ROM BIOS checksum failure | |
| 10x short | CMOS shutdown Read/Write error | |
| 11x short | Cache Memory error | |
| 1x long, 3x short | Conventional/Extended memory failure | |
| 1x long, 8x short | Display/Retrace test failed | |
| AWARD (long+short beeps) | ||
| 1x long, 2x short | Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information | |
| Repeating (Endless loop) | Memory error. Bad memory or bad connection | |
| 1 Long, 3 Short | Video adapter failure. Bad video adapter or memory | |
| High freq. beeps (while running) | CPU is overheating. CPU fan failure | |
| Repeating High, Low beeps | CPU failure. Bad processor | |
| Any other beep(s) | RAM problem. | |
| IBM (long+short beeps) | ||
| No Beeps | No Power, Loose Card, or Short. | |
| 1 Short Beep | Normal POST, computer is ok. | |
| 2 Short Beep | POST error, review screen for error code. | |
| Continuous Beep | No Power, Loose Card, or Short. | |
| Repeating Short Beep | No Power, Loose Card, or Short. | |
| One Long and one Short Beep | Motherboard issue. | |
| One Long and Two short Beeps | Video (Mono/CGA Display Circuitry) issue. | |
| One Long and Three Short Beeps. | Video (EGA) Display Circuitry. | |
| Three Long Beeps | Keyboard / Keyboard card error. | |
| One Beep, Blank or Incorrect Display | Video Display Circuitry. | |
| MACINTOSH (different tones) | ||
| Error Tone. (two sets of different tones) | Problem with logic board or SCSI bus. | |
| Startup tone, drive spins, no video | Problem with video controller. | |
| Powers on, no tone. | Logic board problem. | |
| High Tone, four higher tones. | Problem with SIMM. | |
| PHOENIX (different intervals) | ||
| 1-1-1-3 | Verify Real Mode. | |
| 1-1-2-1 | Get CPU type. | |
| 1-1-2-3 | Initialize system hardware. | |
| 1-1-3-1 | Initialize chipset registers with initial POST values. | |
| 1-1-3-2 | Set in POST flag. | |
| 1-1-3-3 | Initialize CPU registers. | |
| 1-1-4-1 | Initialize cache to initial POST values. | |
| 1-1-4-3 | Initialize I/O. | |
| 1-2-1-1 | Initialize Power Management. | |
| 1-2-1-2 | Load alternate registers with initial POST values. | |
| 1-2-1-3 | Jump to UserPatch0. | |
| 1-2-2-1 | Initialize keyboard controller. | |
| 1-2-2-3 | BIOS ROM checksum. | |
| 1-2-3-1 | 8254 timer initialization. | |
| 1-2-3-3 | 8237 DMA controller initialization. | |
| 1-2-4-1 | Reset Programmable Interrupt Controller. | |
| 1-3-1-1 | Test DRAM refresh. | |
| 1-3-1-3 | Test 8742 Keyboard Controller. | |
| 1-3-2-1 | Set ES segment to register to 4 GB. | |
| 1-3-3-1 | 28 Autosize DRAM. | |
| 1-3-3-3 | Clear 512K base RAM. | |
| 1-3-4-1 | Test 512 base address lines. | |
| 1-3-4-3 | Test 512K base memory. | |
| 1-4-1-3 | Test CPU bus-clock frequency. | |
| 1-4-2-4 | Reinitialize the chipset. | |
| 1-4-3-1 | Shadow system BIOS ROM. | |
| 1-4-3-2 | Reinitialize the cache. | |
| 1-4-3-3 | Autosize cache. | |
| 1-4-4-1 | Configure advanced chipset registers. | |
| 1-4-4-2 | Load alternate registers with CMOS values. | |
| 2-1-1-1 | Set Initial CPU speed. | |
| 2-1-1-3 | Initialize interrupt vectors. | |
| 2-1-2-1 | Initialize BIOS interrupts. | |
| 2-1-2-3 | Check ROM copyright notice. | |
| 2-1-2-4 | Initialize manager for PCI Options ROMs. | |
| 2-1-3-1 | Check video configuration against CMOS. | |
| 2-1-3-2 | Initialize PCI bus and devices. | |
| 2-1-3-3 | Initialize all video adapters in system. | |
| 2-1-4-1 | Shadow video BIOS ROM. | |
| 2-1-4-3 | Display copyright notice. | |
| 2-2-1-1 | Display CPU type and speed. | |
| 2-2-1-3 | Test keyboard. | |
| 2-2-2-1 | Set key click if enabled. | |
| 2-2-2-3 | 56 Enable keyboard. | |
| 2-2-3-1 | Test for unexpected interrupts. | |
| 2-2-3-3 | Display prompt "Press F2 to enter SETUP". | |
| 2-2-4-1 | Test RAM between 512 and 640k. | |
| 2-3-1-1 | Test expanded memory. | |
| 2-3-1-3 | Test extended memory address lines. | |
| 2-3-2-1 | Jump to UserPatch1. | |
| 2-3-2-3 | Configure advanced cache registers. | |
| 2-3-3-1 | Enable external and CPU caches. | |
| 2-3-3-3 | Display external cache size. | |
| 2-3-4-1 | Display shadow message. | |
| 2-3-4-3 | Display non-disposable segments. | |
| 2-4-1-1 | Display error messages. | |
| 2-4-1-3 | Check for configuration errors. | |
| 2-4-2-1 | Test real-time clock. | |
| 2-4-2-3 | Check for keyboard errors | |
| 2-4-4-1 | Set up hardware interrupts vectors. | |
| 2-4-4-3 | Test coprocessor if present. | |
| 3-1-1-1 | Disable onboard I/O ports. | |
| 3-1-1-3 | Detect and install external RS232 ports. | |
| 3-1-2-1 | Detect and install external parallel ports. | |
| 3-1-2-3 | Re-initialize onboard I/O ports. | |
| 3-1-3-1 | Initialize BIOS Data Area. | |
| 3-1-3-3 | Initialize Extended BIOS Data Area. | |
| 3-1-4-1 | Initialize floppy controller. | |
| 3-2-1-1 | Initialize hard-disk controller. | |
| 3-2-1-2 | Initialize local-bus hard-disk controller. | |
| 3-2-1-3 | Jump to UserPatch2. | |
| 3-2-2-1 | Disable A20 address line. | |
| 3-2-2-3 | Clear huge ES segment register. | |
| 3-2-3-1 | Search for option ROMs. | |
| 3-2-3-3 | Shadow option ROMs. | |
| 3-2-4-1 | Set up Power Management. | |
| 3-2-4-3 | Enable hardware interrupts. | |
| 3-3-1-1 | Set time of day. | |
| 3-3-1-3 | Check key lock. | |
| 3-3-3-1 | Erase F2 prompt. | |
| 3-3-3-3 | Scan for F2 key stroke. | |
| 3-3-4-1 | Enter SETUP. | |
| 3-3-4-3 | Clear in-POST flag. | |
| 3-4-1-1 | Check for errors | |
| 3-4-1-3 | POST done--prepare to boot operating system. | |
| 3-4-2-1 | One beep. | |
| 3-4-2-3 | Check password (optional). | |
| 3-4-3-1 | Clear global descriptor table. | |
| 3-4-4-1 | Clear parity checkers. | |
| 3-4-4-3 | Clear screen (optional). | |
| 3-4-4-4 | Check virus and backup reminders. | |
| 4-1-1-1 | Try to boot with INT 19. | |
| 4-2-1-1 | Interrupt handler error. | |
| 4-2-1-3 | Unknown interrupt error. | |
| 4-2-2-1 | Pending interrupt error. | |
| 4-2-2-3 | Initialize option ROM error. | |
| 4-2-3-1 | Shutdown error. | |
| 4-2-3-3 | Extended Block Move. | |
| 4-2-4-1 | Shutdown 10 error. | |
| 4-3-1-3 | Initialize the chipset. | |
| 4-3-1-4 | Initialize refresh counter. | |
| 4-3-2-1 | Check for Forced Flash. | |
| 4-3-2-2 | Check HW status of ROM. | |
| 4-3-2-3 | BIOS ROM is OK. | |
| 4-3-2-4 | Do a complete RAM test. | |
| 4-3-3-1 | Do OEM initialization. | |
| 4-3-3-2 | Initialize interrupt controller. | |
| 4-3-3-3 | Read in bootstrap code. | |
| 4-3-3-4 | Initialize all vectors. | |
| 4-3-4-1 | Boot the Flash program. | |
| 4-3-4-2 | Initialize the boot device. | |
| 4-3-4-3 | Boot code was read OK. | |
User-Comments: BIOS Beep tones
