Member Avatar for india2020

my father bought one p4 computer from our family friend for my educational purpose. the computer has worked only for the first day next day computer's keyboard stops working after some hours windows doesn't start then the our family friend came and we also put earthwire. then he installed new windows then after some hours the computer hasn't started and the display doesn't work cpu starts beeping please send some use ways to solve this problem.

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  • Latest Post Latest Post by crunchie

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Brief, practical diagnostic roadmap. Credit to for asking for the beep pattern, for pointing out BIOS-specific codes, and for clarifying the sound comes from the system speaker. The single most useful diagnostic detail is the exact beep pattern (count long vs short, whether it repeats, and whether it starts before or after fans/spindles begin). Record that pattern first — it narrows the fault list immediately.

Recommended minimal-boot checks (power off and unplug before touching anything):

  • Confirm a speaker is connected to the motherboard header so beeps are audible.
  • Remove all drives and USB devices; leave only CPU, one stick of RAM, and video (or onboard video).
  • Try one RAM stick at a time in each slot; reseat the video card if present.
  • Power on and note exact beep pattern, front-panel LED behavior, fan action, and whether the monitor shows any POST messages.

Hardware and PSU checks:

  • Swap in a known-good PSU if available; intermittent or wrong voltages often cause POST/boot beeps (see ’s note about changing the PSU).
  • Inspect the motherboard for bulging or leaking capacitors, scorch marks, or a strong burnt smell. Visible damage points toward board repair or replacement.
  • Use basic safety: disconnect mains, ground yourself, and avoid probing live connectors unless experienced.

Final steps and what to report for deeper help: clear CMOS (jumper or remove the coin cell for a minute), test a different keyboard port/type if the keyboard is failing, and photograph the motherboard model/BIOS sticker. When asking for help later, include the exact beep pattern, motherboard make/model, BIOS vendor/version (if known), which components were removed for the minimal boot, and whether swapping the PSU changed behavior.

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Member Avatar for willcomp

How about posting the beep code (pattern) along with BIOS installed. Beeps can mean a lot of different things.

Member Avatar for 4th&3wood

What is the make and model of this computer?

If you know this, you can google it to find out what the manufacturer of the BIOS is. You can find the beep codes for most BIOS here.

Member Avatar for jermaghs07

Fist of all the CPU doesn't beep. that is coming from a speaker mounted on the motherboard. now willcomp is right the beeps can mean a lot of different things.

Member Avatar for kenneith

i switched the power supply and before i switched the beeping wasent there

Member Avatar for crunchie

i switched the power supply and before i switched the beeping wasent there

So start your own thread instead of dredging up an old one and explain your problem in a little more depth.

Edited by crunchie because: n/a
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