Member Avatar for nanikoolkraker

`Hi guys….
my Pc Is not working….
no signal for monitor, no power for mouse & keyboard,
Fans are working; power is coming for DVD R/W
What might be the problem… any bady can help me….
Pls guys get me out of this….  

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  • Latest Post Latest Post by nanikoolkraker

Dani AI

Generated

Symptom summary and quick interpretation (based on posts and 's checklist): fans and the optical drive get power, but USB devices and the display get nothing. Removing RAM produced no POST beep. That combination most often means either the board never reaches POST (so it never drives USB/graphics), or there is simply no chassis speaker connected so POST failures are silent. It does not prove the PSU or CPU is healthy.

Practical next steps to narrow it down:

  1. Attach a small PC speaker to the motherboard speaker/header and try to power on. A missing or disconnected speaker will make the common "no-RAM" beep test useless. Beep patterns identify failures if the board is actually POSTing.

  2. Do a bench test: strip the system to minimal parts outside the case (motherboard on non-conductive surface, CPU + cooler, one known-good RAM stick in the primary slot, PSU, case speaker). Use the motherboard power-switch pins (short briefly with a screwdriver) to eliminate a faulty front-panel switch. This rules out a short from standoffs and confirms basic POST capability.

  3. Verify the PSU is supplying the correct rails without opening it: use a basic PSU tester or swap in a known-good PSU. Do not attempt internal PSU repairs. Fans and drives can be powered while the +12V rail is OK but CPU/3.3V/5V rails or the standby rail may be faulty.

  4. Inspect the motherboard closely: look for bulging/leaking capacitors, scorch marks, or bent pins in the CPU socket (LGA pins) / bent CPU pins (PGA). Also check any onboard POST/debug LEDs or a 2-digit POST code display if present.

  5. Clear CMOS (jumper or remove battery for a few minutes) and retry. Some boards also have BIOS-recovery features; consult the board manual.

If bench testing with a speaker and a known-good PSU still yields absolute silence, the most likely outcomes are a failed motherboard or CPU. At that point component swaps (known-good CPU/mobo) or professional diagnosis are the practical next steps.

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Member Avatar for Ewald Horn

There's a few things that can be wrong :

  1. The power adapter to the mainboard is not properly connected. This might seem strange, but that plug can be seated poorly, so it will still start the machine, but it might not give power to the main board.

  2. Remember that your fans and DVD R/W works of different power ports, so even if they are working, it doesn't mean the power supply is not faulty. If the circuits powering the main board are faulty, your other components could still be getting their required power, so if you have a multi-meter, double check your power supply output. Don't do this if you are not sure of what you are doing, please.

  3. Check if the RAM, expansion cards (AGP etc.) and CPU are properly seated. Any one of them not sitting properly could prevent the main board from firing up.

  4. Check that the CPU fan spins. On some main boards, if the CPU fan does not fire up, the board will shut down immediately to prevent the CPU from burning out.

  5. Unplug ALL devices, even your monitor, from the machine an switch it on. Then plug in the monitor and see if there's anything happening.

If none of this works, you might want to consider getting a more experienced person to take a look.

Member Avatar for nanikoolkraker

actually when i removed my ram and try to start up. bcoz to test whether the motherboard is functioning or not.. bt motherboard did not made a beep sound.. hat might be it..??

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