Member Avatar for virdhee

Hello,

My problem is that my PC refuses to start. When I switch it on I can hear the fans working followed by 3 beeps. I can also confirm that the hard drive's both start to spin, I have 2 hard drives.

However, I receive no information on my monitor. It is as if my monitor is not switched on, although I know for a fact that it is and is in full working order. I have tried exchanging RAM modules positions and installing them individually. Motherload light is ON.

Any ideas as to where the problem may lie.
Please help

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  • Latest Post Latest Post by bRutal!

Dani AI

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Three short beeps with fans and drives spinning points to a POST failure rather than a monitor fault. was right to flag beep codes and to consider power, so a short, ordered diagnostic flow helps isolate the faulty subsystem without swapping parts at random.

Identify the BIOS vendor and match the exact beep pattern to the vendor codes (AMI, Award, Phoenix differ). A concise mapping and background on POST/beep codes can be found at Computer Hope and in the POST overview on Wikipedia: Computer Hope - BIOS Beep Codes Power-on self-test (POST) - Wikipedia.

Recommended diagnostic steps (in order):

  • Perform a minimal-hardware POST: power off and unplug, remove drives, add-in cards and front-panel USB; leave motherboard, CPU+heatsink, one DIMM (in the primary slot), and the video device required by that board. Attach a motherboard speaker if available to confirm the beep pattern.
  • If RAM has already been tested individually (as reported), shift focus to CPU/motherboard: reseat the heatsink, inspect the CPU socket for bent pins (LGA) or damaged pads, look for bulging capacitors or scorch marks, and clear CMOS per the manual.
  • Verify power connections: confirm the 24-pin ATX and the 4/8-pin CPU power plugs are fully seated. Test PSU rails with a multimeter or PSU tester to confirm +12V/+5V/+3.3V under load before replacing the supply.

Record the exact beep grouping (how the three beeps repeat) and the motherboard model before escalating to vendor documentation or RMA. Handle CPU/socket work with ESD precautions and consult the board manual for the CLR_CMOS/jumper procedure.

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Member Avatar for RueB2sDe

Normally when there are issues with the post you should receive more beeps then 3.

Are you hearing additional beeps? You can search on the MB Manufacture for the BIOS POST BEEP CODES.

I am used to a consecutive beeps. It should give three beeps rapidly then pause then start again. If you are getting this, count how many beeps between each pause.

If you are not, possibly could be the heat sink, or needing additional fans in your tower, since you are running two HDD have you added an additional fan?

RueB 2s De.

Member Avatar for bRutal!

i'ts possible that your power supply works badly...I had a similar problem...try to change it and you'll see if it is better...worked at me...'njoy ;)

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