Power problems?

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VistaHatesMe

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Oct 25, 2007
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Hi guys/gals those more knowledgeable then I.

Guess what I am NOOB and need help. I'm sure you are not use to this. ;)

Well I have an acer AST180-UD400B that has been a great computer until recently when one night i shut it down and it wouldn't turn on the next morning.
I had a buddy of mine test the power supply and it was found to be bad.
To my surprise acer was more then happy to send me a new one at no charge.
So i went to install it today and the same thing happened. Just wont turn on.

What i have noticed is that if i don't plug in the 4 wire connector {2 Yellow wires with black stripes 2 Solid black wires} to the left of the cpu/processor the unit will power up, the dvd rom kicks in and it triggers the fans but the video doesn't kick on.


So now finally then question.
Whats broke?
Should i shoot it?
Do i now own a 20lb paper weight?
 
Joined
Mar 16, 2002
Messages
13,404
VistaHatesMe said:
Hi guys/gals those more knowledgeable then I.

Guess what I am NOOB and need help. I'm sure you are not use to this. ;)

Well I have an acer AST180-UD400B that has been a great computer until recently when one night i shut it down and it wouldn't turn on the next morning.
I had a buddy of mine test the power supply and it was found to be bad.
To my surprise acer was more then happy to send me a new one at no charge.
So i went to install it today and the same thing happened. Just wont turn on.

What i have noticed is that if i don't plug in the 4 wire connector {2 Yellow wires with black stripes 2 Solid black wires} to the left of the cpu/processor the unit will power up, the dvd rom kicks in and it triggers the fans but the video doesn't kick on.


So now finally then question.
Whats broke?
Should i shoot it?
Do i now own a 20lb paper weight?
well you need to plug that 4pin 12v power connector in. if it still doesnt start then it may be you video. does it make any beeps when you start up?
 

VistaHatesMe

Thread Starter
Joined
Oct 25, 2007
Messages
2
brite750 said:
well you need to plug that 4pin 12v power connector in. if it still doesnt start then it may be you video. does it make any beeps when you start up?
I assume your talking about the beeps from the pc speaker? No no beeps.

Yea i know that it needs to be hooked up. The second its hooked up the power supply will shut down.
 
Joined
Mar 16, 2002
Messages
13,404
unplug the drives from the power, pull out any pci cards, in other words have only the psu, mb, cpu with fan, 1 stick of ram and gfx see what happens then, you will have to have a known working psu, most times what you are descibing is the psu
 

crjdriver

Moderator
Joined
Jan 2, 2001
Messages
43,411
The above is good advise; you can try it for troubleshooting.

I tend to think you might have had a VR [voltage regulator] on the board fail. What that 4pin lead does is supply 12V pw to the cpu [after it goes through a reg to step down to 1.5V or whatever the cpu uses]
 
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