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Is this the power supply?

by nutter130 / August 21, 2006 10:16 PM PDT

Hi, i have a Sony Desktop PC, it won't boot up though, when i turn the power button on, the PC will turn on, the fans will spin and everything works, the CD drives will eject, but the moniter stays on standby, the moniter and cables all work as i tested them.
I have already tested the graphics card and that hasn't changed anything, i'm not sure i'm getting the BIOS start up beep.
I don't know if this will change anything but when i put in the power cable into the back of the PC sometimes it will turn the PC on by its self. But the same problem is there it just turns on.

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When I see that...
by R. Proffitt Forum moderator / August 21, 2006 10:27 PM PDT

It's either the supply or the motherboard. Since troubleshooting costs more than either part we swap in one, then the other.

Of course an old CMOS BATTERY has been known to do this too. Cheaper than the other parts so tell how old it is. If 2 or more years try it since it's only a few dollars and worth the risk.

Keep in mind that I'm writing from just what was told, which was quite slim.


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Reply to: When I see that...
by nutter130 / August 22, 2006 7:23 PM PDT
In reply to: When I see that...

I have tried the CMOS battery with a working one and it still isn't working.
Sorry for providing little info, but thats all i know thats wrong.
The green light on the motherboard between the AGP slots are on, if that helps in anyway, i've tester everything except unplugging all the drives but that wouldn't stop the screen turning on would it? and the PSU.

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Yes it can. For example...
by R. Proffitt Forum moderator / August 23, 2006 12:00 AM PDT

I've found dying IDE drives that stop the system from performing the POST and then we have no display.

If we read there are cards and more to troubleshoot a non booting, no display machine but I find reducing the parts to just motherboard, PSU, CPU and speaker to get it to beep to be good enough since if it doesn't beep I know it's one of those 4 parts.


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I'll try that
by nutter130 / August 23, 2006 12:28 AM PDT

Thanks i'll try that in a minute and let you know of the results

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by nutter130 / August 23, 2006 2:07 AM PDT
In reply to: I'll try that

I disconnected everything, CD drives, modem, sound card, HDD, RAM and the floppy drive, everything except the power supply and graphics card (there's no on-board one).
I have two graphics card and tried both, one i know definately works.

It is still not working though, the screen stays on standby. Would that mean it's either the motherboard and Power supply?

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Does it beep?
by R. Proffitt Forum moderator / August 23, 2006 2:12 AM PDT
In reply to: Problem

We want the unit to beep in protest of no ram or whatever we can remove.


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by nutter130 / August 23, 2006 4:18 AM PDT
In reply to: Does it beep?

Nope doesn't beep the way it would be classed as a beep, theres a sound that sounds like somethings turning though.

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Beep Update
by nutter130 / August 23, 2006 5:13 AM PDT
In reply to: Beep

Nope sorry thats the CD drive loading, there is no sound once everything has been disconnected.

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If changing the CMOS battery doesn't work
by VAPCMD / August 22, 2006 1:27 PM PDT

Here's another an inexpensive PSU tester. Both UltraX and Coolmax make multi-line PSU testers and they're not expensive if you shop carefully.

Let us know.

Good Luck.


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