Member Avatar for jayder

ok i'm trying to fix my friends emachine but i can't seem to found the problem.
i hooked everything up turned on the pc nothing happens so i tested the power supply found out it was the powersupply i changed the powersupply.
now the pc want stay on it would come on for a min and then turn off.i don't think its the powersupply because i test it and it good.to get on back on i have to put the powersupply tester on the powersupply and it come on. now i try to put windows on it ,it will go as far the begening and then its start to blink and blink thats it.

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  • Latest Post Latest Post by cguan_77

Dani AI

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— quick, focused checklist to narrow this down. Good point from about thermal causes; while you include those checks, also work through hardware isolation so you do not replace parts blindly.

  • Breadboard the system: power the motherboard outside the case with only CPU, one RAM stick, and video (if no onboard). This rules out shorts to the chassis or bad add-in cards.
  • Add a motherboard speaker or watch the debug LED to catch POST/beep codes; note any pattern and report it.
  • Reseat each RAM module and test one stick at a time in every slot. If it stays up long enough, run a memory tester from USB.
  • Verify both main ATX power connectors (24-pin and the 4/8-pin CPU) are fully seated and undamaged.
  • Inspect the board for bulging caps, scorch marks, or bent CPU-socket pins.
  • Clear CMOS (battery out or jumper) to rule out a corrupted BIOS setting.
  • If the installer “blinks” during Windows setup, try booting a Linux live USB or a different install media/drive to separate hardware from installer/media problems.
  • If the system still dies in seconds, bench-test with a known-good PSU or remove the board from the case to rule out a short.

Post the motherboard model, any beep/LED codes, and how long it stays on after you try these steps and we can narrow the next move.

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Member Avatar for andy@daniweb

can u tell how to shut down PC at specific time

Member Avatar for jayder

now i was just on it ,it stay on for a sec then turn off

Member Avatar for cguan_77

check if there's enough thermal compound on your heatsink..check your cpu fan also.. it could be overheating problem..to the worst case it could be a faulty processor....

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