One long beep 3 short beeps

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The computer system POST (power-on self-test) checks a computer"s interior hardware for compatibility and link prior to starting the remainder of the boot process. If the computer system passes the POST, the computer system might provide a single beep (some computers might beep twice) as it starts and continues to boot. However before, if the computer system stops working the POST, the computer system doesn"t beep or geneprices a beep code telling the user the resource of the trouble.

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If your computer system has actually an irconstant POST or a beep code not discussed listed below, follow the POST troubleshooting steps to determine the failing hardware component.


AMI BIOS beep codes

Below are the AMI BIOS beep codes. However, bereason of the wide range of different computer system manufacturers with this BIOS, the beep codes might differ.

Beep CodeDescriptions
1 shortDRAM refresh faiattract.
2 shortParity circuit faientice.
3 shortBase 64 K RAM failure.
4 shortSystem timer faitempt.
5 shortProcess faientice.
6 shortKeyboard controller Gate A20 error.
7 shortVirtual mode exception error.
8 shortDisplay memory Read/Write test faitempt.
9 shortROM BIOS checksum faientice.
10 shortHow to rearea the CMOS battery.
11 shortCache memory error.
1 lengthy, 3 shortConventional/Extended memory faiattract.
1 long, 8 shortDisplay/Retrace test failed.
Two-tone sirenLow CPU fan speed, voltage level worry.

Award BIOS beep codes

Below are Award BIOS beep codes. However before, bereason of the wide array of various computer system manufacturers via this BIOS, the beep codes might differ.

Beep CodeDescription
1 lengthy, 2 shortIndicates a video clip error has occurred and also the BIOS cannot initialize the video display screen to screen any type of extra indevelopment.
1 long, 3 shortVideo card not detected (reseat video card) or poor video card.
Beeps repeating endlessly.RAM difficulty.
Repeated high frequency beeps while COMPUTER is running.Overheating processor (CPU).
Repeated beeps alternating high & low frequency.Issue via the processor (CPU), maybe damaged.

If any other correctable hardware concerns are discovered, the BIOS display screens a message.

Dell beep codes

Beep CodeDescription
1 beepBIOS ROM corruption or faientice.

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2 beepsMemory (RAM) not detected.
3 beepsMotherboard failure.
4 beepsMemory (RAM) faitempt.
5 beepsCMOS battery faientice.
6 beepsVideo card failure.
7 beepsBad processor (CPU).

For various other Dell beep codes, please refer to Dell"s beep codes and PSA diagnostics chart web page.

IBM BIOS beep codes

Below are general IBM BIOS beep codes. However, bereason of the wide variety of models shipping via this BIOS, the beep codes may vary.

Beep CodeDescription
No beepsWhy won"t my computer system turn on?
1 short beepNormal POST, computer system is ok.
2 brief beepPOST error, review screen for error code.
Continuous beepNo power, loose card, or short.
Repeating brief beepNo power, loose card, or brief.
1 lengthy and also 1 short beepMotherboard problem.
1 long and also 2 short beepsVideo (Mono/CGA display screen circuitry) problem.
1 long and 3 short beeps.Video (EGA) screen circuitry.
3 lengthy beepsKeyboard or key-board card error.
1 beep, empty or incorrect screen.Video display circuitry.

Macintosh startup tones

TonesError
Error tone. (two sets of various tones).Problem with logic board or SCSI bus.
Startup tone, drive spins, no video.Problem through video controller.
Powers on, no tone.Logic board difficulty.
High tone, four greater tones.Problem with SIMM.

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Phoenix BIOS beep codes

Below are the beep codes for Phoenix BIOS Q3.07 or 4.x.