General discussion

Locked

PC not booting M'board or Power Supply?

By gammada ·
My VAIO PC suddenly went black while working on Photoshop. After that the monitor shut itself off --no video signal- and the PC lit the memory card reader LED as if stuck without having any card inside. Power button didn't respond so I had to unplug the machine entirely.

After that, all subsequent attempts to boot up the machine bring the same results: Fans go full blast, HD read LED goes lit, power LED also comes on but there seems to be no HD starting and there is no power on either the keyboard (PS2) or the mouse (USB) and no video signal coming out. The machine did this previously but it always got back to work with a switch off/ on technique.

Any ideas as to what is happening here?

This conversation is currently closed to new comments.

12 total posts (Page 1 of 2)   01 | 02   Next
| Thread display: Collapse - | Expand +

All Comments

Collapse -

by mjd420nova In reply to PC not booting M'board or ...

It does sound like a power supply failure, as the hard drive doesn't spin up. The hard drive may have developed a fault that is holding the power supply down, try isolating by removing the hard drive, that should allow you to see the start up screen.

Collapse -

Sorry

by bhagat_singh In reply to

After removing Hard Disk as well the same problem is there. It still not getting on. No Video Signals, no lights on key board and mouse.

Collapse -

by Jim_P In reply to PC not booting M'board or ...

If removing the hard drive fails to resolve your problem, start removing other devices such as CD-ROMs, add on cards, etc. Do you have a spare power supply laying around?

Kind Regards,
Jim

Collapse -

by gammada In reply to PC not booting M'board or ...

With or without HD connected the result is the same. BTW I just noticed a green LED on the mainboard that remains lit even when the machine is turned off.

Please mjd420nova tell me that I do have a power supply failure indeed!

Collapse -

by gammada In reply to PC not booting M'board or ...

Jim_P: No I don't have other power supplies with the 24-pin connector. Do you think it will be possible to connect the 24-pin power supply to a 20-pin machine to see if it works there?

Collapse -

by stefanrp97 In reply to PC not booting M'board or ...

There are adapters to change the power cable from a 20 to 24 pin. If it is already a 24, there might be a way to disconnect 4 pins from one side of the connector. My last power supply I bought had that feature. It sounds to me like your problem could be the motherboard or processor if the power supply swap yields the same results.

Collapse -

by TheChas In reply to PC not booting M'board or ...

The green LED on the motherboard lets you know that the 5 volt standby power is present and that it is unsafe to remove parts from the motherboard.

I suspect that you have a CPU or mainboard failure.

If you have a local small computer repair shop or store nearby, they should be able to test your power supply for you.

Chas

Collapse -

by Jim_P In reply to PC not booting M'board or ...

Yes you can plug a 24 pin connecter into a 20pin socket (It's keyed, so you can't mess it up :) ). But if the motherboard has a 24pin socket then it needs the extra power, which as mentioned here on this question you can get a 20 to 24 pin adapter.

Regards,
Jim

Collapse -

by Jim_P In reply to

Another to add, I can just vaguely remember, you can also plug a 20 pin power supply into your 24 pin motherboard, they are keyed so you can't get it wrong. This would be good just to test, then further down the track you can either buy your adapter or buy a power supply that has the 24 pin connecter.

Cheers,
Jim

Collapse -

by Jim_P In reply to

Well CPUs hardly die, so it maybe your motherboard, just have to think can you still buy a motherboard to suit your current ram, CPU, or should you bite the bullet and go for an upgrade.

Regards,
Jim

Back to Desktop Forum
12 total posts (Page 1 of 2)   01 | 02   Next

Hardware Forums