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Unable to power up computer

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by lmayeda 2 views

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I have a Dell Optiplex GX260 that will not power up. It was working fine one day, powered off for the night and the next day it does not power on. No disk or fan sounds. Power light is amber and the light on the mother board is lit. No beeps, no LED lights on the back. I've tried a good power source. The PC had not been giving any problems until it just decided to quit. I've reseated the cables and memory. How can I tell if it is the power switch, the power supply, the mother board or something else? Thanks in advance.

6 replies

by thechas

The fact that you have the 5 volt standby light on the motherboard is a good sign.

If you can, try swapping the reset and power switch connections to the motherboard. If the reset switch will now power your computer, all you have is a bad power switch. Just about any momentary normally open switch will work as a power switch.

To see if it is the motherboard or the power supply, I use an inexpensive power supply test box that I picked up online for under $10. You plug the power supply in, and if the lights come on, things are good.

Alternately, swap in a known good power supply.

If the power switch and power supply are good, that leaves the power control circuit on the motherboard.

Chas

by scosta

We use Optiplex desktops in my office and I've seen the same thing happen to machines here. Unfortunately, the fix has been to replace the power supply, and more often than not, the CPU.

by painguin1

We have the same issues. I work in an environment where we use Dell workstations (and HP Servers), that should tell you something. I like Dell though... Anyway, I had two systems do the same thing just a couple of weeks ago.

The same symptoms and all. I replaced the PSU's on both of them to no avail. Then the Motherboards, then the CPU itself. Turns out that was the problem in our case.

But most of the time it is jus the PSU rather the Motherboard light is on or not.

Thanks,

PAINguin

by edzbasilio

I Think That's my Problem Too..

LED in my board is Power.on but on Monitor is Always BLACK.SCREEN Ive try to check my board if it has blow-up capacitor and i found 2.Capacitors and i decide to Buy New Board And format my HDD C:\ cause my HDD back-up is in the D:\ & E:\

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