Member Avatar for xiltepin

I hava a vaio PC and suddenly it doesn't start. when I push the on button I can hear the beep the power button starts turns on for a second and then turns off but I can hear the fan is running, does anyone know what can be the reason? also the monitor is not displaying anything.

thanks in advance

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  • Latest Post Latest Post by igor056

Dani AI

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A few focused checks that aren't in the replies yet will narrow this down quickly.

: first, write down exactly what you hear and see — the beep pattern (how many, long/short, repeats), any motherboard POST/debug LEDs, HDD activity light behavior, and whether the monitor gets any power-signal (try its input/source switch). 's and 's points about checking connections and ESD safety are good starting context.

Things to try next (non-redundant steps):

  • Inspect the motherboard visually for bulging/leaking capacitors, burn marks, or loose standoffs/screws that could short the board after shipping.
  • Check the front-panel power-switch wiring or momentarily short the power pins on the case header (with power disconnected first) to rule out a bad switch.
  • Bench-test the board outside the case on a non-conductive surface to eliminate case shorts from dropped screws or misaligned standoffs.
  • Verify the PSU: either measure the main rails with a multimeter/PSU tester or swap in a known-good PSU. A unit that supplies standby power yet fails under load can cause the symptom you describe.
  • Note the beep pattern and consult the motherboard/BIOS beep-code table (or the board manual) — that points directly at CPU, RAM, or video problems.

Safety and next steps: always unplug mains before touching connectors, discharge capacitors by shorting PSU pins only when you know what you are doing, and avoid extended powered tests if the PSU or board looks damaged. If the above narrows it to PSU or a visibly damaged board, swapping the PSU or getting a local bench test is the fastest path to a definitive answer. Report the exact beep pattern, motherboard model, PSU make/model, and any visual damage to refine the diagnosis.

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Member Avatar for fren

Laptop or desktop?

Reset your cmos settings.

Try reseating the memory sticks. Run your system with one stick installed. Test it one a time in different slots.

Member Avatar for xiltepin

it's a pc. before this happened I changed the dvd-rom drive for a new one and it was working perfect for a week and then I sent my pc to my another apartment via UPS and then it stopped working. the pc was perfectly protected so what I was thinking was that maybe something got disconnected inside? any ideas?

thanks

Member Avatar for xiltepin

sorry it is a desktop

Member Avatar for fren

Okay, the best way to do is unplug and plug them again. There is something loose connection inside the cpu unit. Check everything.. Be sure they are all snugly and properly seated and connected. Reseat memory sticks and video card.

Member Avatar for igor056

Just a simple thought. If you are attempting to find loose items within your PC, I hope that you have taken the precaution of using an anti-static wrist strap. I am probably trying to suggest something that you will do automatically but it is always better to be safe now, rather than sorry later

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