Diagnosa Komputer Melalui Kode Beep BIOS

Jika komputer dinyalakan, maka akan melalui satu proses yang disebut POST (Power On Self Test). Proses ini merupakan dignosa singkat yang disertakan dalam proses boot oleh perusahaan yang membuat BIOS. Karena terkadang yang menjadi masalah adalah Graphic Card atau monitor, sehingga komputer tidak bisa menampilkan pesan di monitor. Untuk itulah disertakan diagnosa komputer melalui kode beep BIOS. Makanya, bagi yang berminat untuk memberikan Solusi Masalah Komputer, sebaiknya memahami masalah ini.

Berikut beberapa kode beep yang umum dari beberapa perusahaan yang membuat BIOS serta pesan yang dikandungnya:

1. AMI (American Megatrends') BIOS


one short
 DRAM refresh failure (Problem with memory)

two short
 Parity circuit failure

three short
 Base 64K RAM failure

four short
 System Timer failure

five short
 Processor failure

six short
 Keyboard Controller / Gate A20 failure

seven short
 Virtual Mode Exception error

eight short
 Display Memory Read/Write failure (fault with video card)

nine short
 ROM BIOS Checksum error (fault with BIOS chip)

ten short
 CMOS Shutdown Read/Write error

eleven short
 Cache memory

one long
 Passed (no errors)

one long, two short
 Video failure

one long, three short
 Base / Extended Memory failure

one long, eight short
 Display / Retrace Test failure


2. AST Research BIOS


one short
 Low level processor verification test failed (POST 1)

two short
 Clearing keyboard controller buffers failed (POST 2)

three short
 Keyboard controller reset failed (POST 3)

four short
 Low level keyboard controller interface test (POST 4)

five short
 Reading data from keyboard controller failed (POST 5)

six short
 System board support chip initialization failed (POST 6)

seven short
 Processor register read/write verify test failed (POST 7)

eight short
 CMOS timer initialization failed (POST 8)

nine short
 ROM BIOS checksum test failed (POST 9)

ten short
 Initialize primary video (POST 10)

eleven short
 8254 timer channel 0 test failed (POST 11)

twelve short
 8254 timer channel 1 test failed (POST 12)

thirteen short
 8254 timer channel 2 test failed (POST 13)

fourteen short
 CMOS power-on and time test failed (POST 14)

fifteen short
 CMOS shutdown byte test failed (POST 15)

one long
 DMA channel 0 test failed (POST 16)

one long, one short
 DMA channel 1 test failed (POST 17)

one long, two short
 DMA page register test failed (POST 18)

one long, three short
 Keyboard controller interface test failed (POST 19)

one long, four short
 Memory refresh toggle test failed (POST 20)

one long, five short
 First 64 KB memory test failed (POST 21)

one long, six short
 Setup interrupt vector table failed (POST 22)

one long, seven short
 Video initialization failed (POST 23)

one long, eight short
 Video memory test failed (POST 24)

3. Award BIOS


one short
 Passed (no errors)

two short
 Any non-fatal error

one long, two short
 Video failure

one long, three short
 Keyboard Controller failure (applies to 286, 386 and 486)

4. Compaq BIOS


one short
 Indicates that the system is booting properly

two short
 General BIOS error - remedy unknown

one short, two long
 Memory Module

one long, one short
 BIOS ROM checksum error

one long, two short
 Video error

7 Beeps: one long, one short, one long, one short, pause, one long, two short
 AGP Video

one long continuous tone
 Memory Module

5. IBM BIOS 


none
 Power Supply or System Board failure (possible short)

one short
 Passed (no errors)

one short (blank screen)
 Video error (check cable)

one short (no boot)
 Floppy Drive error

two short
 Configuration Error (displayed on screen)

repeating short
 Power Supply or System Board failure

continuous
 Power Supply or System Board / Keyboard stuck

one long, one short
 System Board failure

one long, two short
 Video (Mono/CGA) failure (check cable)

one long, three short
 Video (EGA) failure (check cable)

three long
 Keyboard Card error

6. Mylex BIOS


one
 Normal boot

two
 Video adapter error

three
 Keyboard controller error

four
 Keyboard error

five
 PIC 0 error

six
 PIC 1 error

seven
 DMA page register error

eight
 RAM refresh error

nine
 RAM data error

ten
 RAM parity error

eleven
 DMA controller 0 error

twelve
 CMOS RAM error

thirteen
 DMA controller 1 error

fourteen
 CMOS RAM battery error

fifteen
 CMOS RAM checksum error

sixteen
 BIOS ROM checksum error

7. Mylex 386 BIOS


one long
 Normal boot

two long
 Video adapter error

one long, one short, one long
 Keyboard controller error

one long, two short, one long
 Keyboard error

one long, three short, one long
 PIC 0 error

one long four short, one long
 PIC 1 error

one long, five short, one long
 DMA page register error

one long, six short, one long
 RAM refresh error

one long, seven short, one long
 RAM data error

one long, eight short, one long
 RAM parity error

one long, nine short, one long
 DMA controller 0 error

one long, ten short, one long
 CMOS RAM error

one long, eleven short, one long
 DMA controller 1 error

one long, twelve short, one long
 CMOS RAM battery error

one long, thirteen short, one long
 CMOS RAM checksum error

one long fourteen short, one long
 BIOS ROM checksum error

8. Phoenix BIOS


one, one, three
 CMOS Read/Write

one, one, four
 ROM BIOS Checksum failure

one, two, one
 Programmable Interval Timer failure

one, two, two
 DMA Initialisation failure

one, two, three
 DMA Page Register Read/Write failure

one, three, one
 RAM Refresh Verification error

one, three, three
 First 64K RAM Chip/Data Line failure

one, three, four
 First 64K RAM Odd/Even Logic

one, four, one
 First 64K RAM: Address Line

one, four, two
 First 64K RAM: Parity failure

one, four, three
 Fail-Safe Timer Feature (EISA only)

one, four, four
 Software NMI Port failure (EISA only)

two (followed by various combinations)
 First 64K RAM Chip/Data Line failure (combinations indicate which bit)

three, one, one
 Slave DMA Register failure

three, one, two
 Master DMA Register failure

three, one, three
 Master Interrupt Mask Register failure

three, one, four
 Slave Interrupt Mask Register failure

three, two, four
 Keyboard Controller failure

three, three, four
 Display Memory failure

three, four, one
 Display Retrace failure

three, four, two
 Video ROM search proceeding

four, two, one
 Timer Tick failure

four, two, two
 Shutdown failure

four, two, three
 Gate A20 failure

four, two, four
 Unexpected Interrupt in Protected Mode

four, three, one
 RAM test above 64K failure

four, three, two/three
 Programmable Interval Timer, Channel 2 failure

four, three, four
 Realtime Clock failure

four, four, one
 Serial Port error

four, four, two
 Parallel Port error

four, four, three
 Math Co-processor failure

(tone) one, one, two
 System Board Select

(tone) one, one, three
 Extender CMOS RAM

9. Quadtel BIOS


one short
 Indicates that the system is booting properly

two short
 CMOS IC error

one long, two short
 Video error

one long, three short
 Peripheral controller error