Member Avatar for webdes2000

Alright, my sisters main computer was working fine yesterday, and today it wont turn on...
So i check it and when you push the power button it only sounds like its trying to power on and the light on the button flashes.. The fan works fine, it wont turn on..

After reading some threads i unplugged the power and left it off for a while, then went to a different outlet.. i also disconnected everything the drives, HD, all the connection to the computer and then tried to boot and it struggled to turn on but it turned on! WOO! i was excited, figured it would work.. so then i plugged the monitor and it was on just mention their was no disk to boot from.. so i turned it off plugged everything back and now it wont boot again!?

SO could this be the power supply!??

Thanks!

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  • Latest Post Latest Post by finito

Dani AI

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Short assessment: has an intermittent start where the front LED flashes and fans spin but the system won’t POST. ’s idea about peripherals is reasonable, but the fact that plugging any single device reproduces the fault points more toward a power-delivery or short/protection issue than one single drive.

What to check next (safe, non-destructive steps)

  • Do a careful visual inspection of the PSU and motherboard for bulging or leaking capacitors, burned connectors, or melted insulation on power cables. Damaged caps or a shorted connector will cause the PSU to go into protection and give exactly this flaky behaviour.
  • Check the 24-pin and CPU 4/8-pin power plugs for bent/melted pins and ensure they seat fully. Inspect the front-panel power-switch wiring and connectors for corrosion; try momentarily shorting the two power-switch pins on the motherboard to rule out a stuck/broken switch (use a non-conductive, grounded procedure or let a tech do it if unsure).
  • If possible, bench-test with a known-good PSU or use a simple PSU-tester/multimeter to read the +12V, +5V and +3.3V rails under load. If voltages sag or the PSU drops out as soon as a drive is attached, the PSU is the likely culprit.

Practical next steps and caution

  • Swapping in a known-good PSU is the quickest reliable confirmation. If you see bulging caps or scorch marks on the board, motherboard replacement is likely. Before swapping parts, remove the HDD and back up critical data by connecting it to another machine or USB adapter.
  • Work safely: unplug mains before touching connectors, discharge static, and avoid the “paperclip” trick unless you understand the risks. If unsure, take the machine to a shop for a quick PSU swap and visual inspection.

These checks build on ’s peripheral isolation and will tell whether the PSU protection circuitry or a shorted/motherboard fault is causing the flashing-light/no-boot symptom. For general context on PSU behaviour and rails, see computer power supplies.

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Member Avatar for finito

No it sounds like one of your peripherals is bad.

Take of everything and put it back one at a time and boot.

When it doesn't boot you found your culprit

Member Avatar for webdes2000

O o, i was hoping it was the power supply seems ez to replace..
And i did try that, but after i plugged just one peripheral it started having the same problem and it didn't matter which one i connected back?

Member Avatar for finito

hmm.
take out everything and your ram.

Does it give you multiple beeps.

Do you get a single beep when you boot the machine when ur saying it works?

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