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New power supply no POST/no DISPLAY

Tags:
  • Power Supplies
  • Components
  • Displays
Last response: in Components
July 15, 2014 10:25:57 AM

CPU: Pentium Dual Core 1.6ghz
RAM: Kingston DDR2 667 2gb
GPU: Radeon HD4670
MOBO: ECS P4M-900t-m2 rev 1.0


I recently purchased a new PSU because my computer unexpectedly shut down the other day. I thought that my mobo was the problem because there is no light on the power button when i tried to switch it on when it shut down. But then, yesterday my friend came to check what happened and tried to replace my old PSU and it powers on (cpu and gpu fan spinning, LED light is on) but no POST/DISPLAY. I bought another PSU to check if my friends PSU is defective, but still same results, no POST/DISPLAY. What could be the problem?

- I already tried switching RAM Slots and putting one module at a time.(there's no beep indicating incorrect module)
- Removed the GPU and plugged VGA to the onboard(still no POST/Display)
- removed the CMOS to reset the bios (same results)

PC Specs are too old, don't bother.

Hoping to find a solution from you guys. Thanks in advance.

More about : power supply post display

a c 194 ) Power supply
July 15, 2014 10:36:20 AM

Unfortunately, your system is sufficiently old that it may have reached the end of its useful life; capacitor aging in particular may have killed it. Are there any bulging or leaking capacitors on the motherboard? Do an image search for "bad capacitors" to see how they might appear.
If in the PSU, it is hard to say whether or not it may have taken other parts with it when it died. What brand and model (not just wattage) is it?
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July 15, 2014 10:48:02 AM

Already checked each capacitors and there are no signs of any leakage or buldging. The power supply used was a Seasonic 80+ tru-rated 650 watts i think.
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a c 194 ) Power supply
July 15, 2014 11:33:32 AM

Hmmm, I don't recall any Seasonic PSU being a "baddie;" afaik they just don't know how to make a bad one.
Reseat anything you didn't already, including power cables (including CPU).
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