Member Avatar for waqas gull

I have a machin, its mother board's LED is on but do not work any thing. I have replaced Processor, RAM,Hard even battery but not working. Please tell me about this problem.

  • 8 Contributors
  • 8 Replies
  • 219 Views
  • 1 Month Discussion Span
  • Latest Post Latest Post by crunchie

Dani AI

Generated

An LED lit while the system does nothing usually means the board has standby power but never gets to POST. may very well have a dead board as suggested, but a few focused checks will confirm that before buying a replacement. was correct to flag shorts — those and power-supply issues are common false positives.

Try this focused bench-test checklist (unplug mains before swapping parts):

  1. Remove the board from the case and place it on cardboard or another nonconductive surface.
  2. Fit only CPU + cooler, one known-good stick of RAM (in the slot the manual recommends), connect the 24-pin ATX and the 4/8-pin CPU power, attach a CPU fan and a small chassis speaker. No drives, no extra cards.
  3. Momentarily short the case power pins (or connect the front-panel switch) to power on. Watch fans, listen for beep codes, and note any diagnostic LEDs or POST codes.
  4. If nothing happens, try a known-good PSU or a PSU tester before assuming the board is dead. A PSU can show standby LED but still fail under load.
  5. Inspect closely for bulging/leaking caps, burn marks, bent LGA pins, or misplaced standoffs that short the PCB. Check the CMOS-clear jumper and try a CMOS reset (battery out for a few minutes).

If a speaker gives RAM/GPU-related beeps you have clues to proceed; if there are still zero signs of life after a known-good PSU and the minimal bench test, a failing southbridge/BIOS or a damaged power circuit is likely. Replacing the board or using an RMA (if applicable) is the practical next step. Take ESD precautions and avoid live-voltage probing unless experienced — swapping in a known-good PSU and using a speaker/POST card are safer first moves.

Recommended Answers

All 8 Replies

Member Avatar for ramonhodges

I've had motherboards that act just like this (and have one now). I hate to tell you, but it sounds like it's shot.

Member Avatar for mastersofhost

shorts can be fixed most problems are is people put the mb in the wrong type case or touch it with hands with out touching the case at the same time take the mb out and look and see the case is touching the mb some whare also make sure you have the right power supply wats like 180 to 300 are common for newer mb and if you have volt meter test the power supply to make sure it working and make shore the mb caps on the mb is not blown ty paul post back if you need more info

Member Avatar for jbennet

This is a support question, not a hardware swap. Moved.

Member Avatar for Ramvir

I have a machin, its mother board's LED is on but do not work any thing. I have replaced Processor, RAM,Hard even battery but not working. Please tell me about this problem.

Check ur motherboard component.

commented: not very helpful! -4
Member Avatar for jbennet

Check ur motherboard component.

Duh!

Member Avatar for Md Hasan Murad

it is possibly demage...

Member Avatar for Nadeemshkh

I have a machin, its mother board's LED is on but do not work any thing. I have replaced Processor, RAM,Hard even battery but not working. Please tell me about this problem.

Your motherboard controller chip is not working,so replace your motherboard instead of CPU,RAM and Hard.

Member Avatar for crunchie

shorts can be fixed most problems are is people put the mb in the wrong type case or touch it with hands with out touching the case at the same time take the mb out and look and see the case is touching the mb some whare also make sure you have the right power supply wats like 180 to 300 are common for newer mb and if you have volt meter test the power supply to make sure it working and make shore the mb caps on the mb is not blown ty paul post back if you need more info

You may want to try a little punctuation as your post makes no sense at all.
Also, use complete English words as per the site rules.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.