My compuetr power's on for 3 seconds then turns off

Tmoney900 · 30-Jun-2012, 03:24 PM #1

After that I cannot turn it on with the motherboard or the power. It happens every time I power on the psu. Does it with my old power supply as well. HELP!!!

Megabite · 30-Jun-2012, 03:36 PM #2

Howdy,

How old was the PSU in the PC and how do you know the older one you tried is any good.

**crjdriver** · 30-Jun-2012, 03:38 PM #3

You need to provide more info.

Have you changed anything ie added a new video card, swapped mb, etc?
You list some very pw hungry hardware. What pw supply did you swap in to test?

Tmoney900 · 30-Jun-2012, 04:42 PM #4

I changed from a 750W to a 1000w psu and yes it happened with my old power supply this is something very recent.

Megabite · 30-Jun-2012, 04:46 PM #5

Anything happened before this that might be related?

Have you removed any un needed devices.

**crjdriver** · 30-Jun-2012, 10:35 PM #6

Quote:

Originally Posted by Tmoney900

I changed from a 750W to a 1000w psu and yes it happened with my old power supply this is something very recent.

OK, as I understand the issue you had a problem and tried a different pw supply. Problem is still there; is that correct?

Have you tried with all drives disconnected, all usb devices disconnected and any add-in cards pulled [except the video card] If not, do so. If it posts like that, then start connecting devices one at a time until you find the failed part. If it does not post, then you will have to swap parts with known good units, ie ram, mb, cpu, etc.

Tmoney900 · 01-Jul-2012, 02:18 AM #7

I just went through and checked the system and now I'm getting it to start up but I might have found the problem. The D-Ram light went on which is odd b/c my RAM is compatible with my mobo, and now for some odd reason I'm getting no picture.

Tmoney900 · 01-Jul-2012, 02:19 AM #8

So ya it's probably not a psu problem.

**crjdriver** · 01-Jul-2012, 09:25 AM #9

You list 12gig of ram. Pull out ALL ram and pw ON. You should get a beep code [if you have a speaker connected]

Now shutdown and install just a single ram chip and pw ON. See if the board will complete post. If it does, then repeat with another ram chip. You may have a single ram chip that has failed or you may have a problem with the mb.

Tmoney900 · 01-Jul-2012, 02:41 PM **#10**

I'm getting no beep code from the speaker.

Tmoney900 · 01-Jul-2012, 03:05 PM **#11**

That's without the RAM.

**crjdriver** · 01-Jul-2012, 04:26 PM **#12**

If you do not get a beep code with all ram removed, that points at a failed board.

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