Computer won't start.

By Nuwanda ยท 10 replies
Feb 27, 2008
  1. So, I am having some difficulty. The PSU for the computer had been really loud as of late and we were worried that it might break. So, we replaced it.

    I received the new PSU today, took out the old one. (had a little trouble removing the connector near the CPU). Placed the new one in connected everything. Tried powering on and got nothing. there was a slight burning smell.

    Put in the old PSU back in fearing it was DOA. Turned the power on. Nothing again, slight burning smell returned.

    I think I might have fried something.

    Is there a way for me to diagnosis this past I think I might have fried the motherboard?
  2. Nuwanda

    Nuwanda TS Rookie Topic Starter

    Computer components:

    OLD PSU: COOLMAX CT-450N ATX12V 450W Power Supply 115/ 230 V UL, CSA, TUV, CE
    Motherboard: ASUS P5PE-VM LGA 775 Intel 865G Micro ATX Intel Motherboard
    CPU: Intel Celeron D 347 Cedar Mill 3.06GHz 512KB L2 Cache LGA 775 Single-Core Processor
    NEW PSU: Antec earthwatts EA430 ATX12V v2.0 430W Power Supply 100 - 240 V UL, CUL, FCC, TUV, CE, CB, C-tick, CCC

    I would have posted links but, my post count is not high enough.
  3. Tedster

    Tedster Techspot old timer..... Posts: 6,002   +15

    I am not quite sure, but I know dell used proprietary psus and I think packard bell did at one time also. Anybody want to comment on this?
  4. Matthew

    Matthew TechSpot Staff Posts: 5,333   +101

    The new PSU ought to be compatible with that system. Definitely not a good thing if you are smelling something burn.
  5. Nuwanda

    Nuwanda TS Rookie Topic Starter

    This is a Home built machine, I bought parts from

    I was pretty sure the new PSU would work fine. I was really upset when I smelled the burning. After removing the components, I found that it was the mobo.

    Ordering a new one now.

    Do you think my having trouble removing the old PSU could have been the cause of the problem?
  6. Nuwanda

    Nuwanda TS Rookie Topic Starter

    After removing the Heat sink and the CPU, I found the thermopaste hard and dusty. Would this be causing the problems I am having with the system?
  7. Bruce2

    Bruce2 TS Rookie

    While you are waiting for the new board, you can reinstall your heatsink/fan with new thermo paste and try again. You might have just know the heatsink/fan loose while you try to remove the "hard to remove" connector the first time or you might have plugged the connector on the board the first time and took out the board.

    Good luck and let us know how things turn out.
  8. Nuwanda

    Nuwanda TS Rookie Topic Starter

    I applied new thermal paste to the CPU and heat sink, re-attached everything and it was working fine.

    Now, the computer won't start up for longer than 5 minutes, and each shut off makes it last less time.
  9. Nuwanda

    Nuwanda TS Rookie Topic Starter

    Yay! I double checked the cpu fan and it was a little loose. Everything is honky dory!
  10. Matthew

    Matthew TechSpot Staff Posts: 5,333   +101

    Great, :)...
  11. Samstoned

    Samstoned TechSpot Paladin Posts: 1,018

    scarey at it
    close one there
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