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Gateway 800 turns on, but black screen, and doesn't boot up at all

I have a gateway desktop 800 and when i go to turn it on, the light turns on and the harddrive spins but nothing happens and screen stays blank.  Tried a different power supply but no different.  Before this happend i got a error that said "Applicaion layer gateway service" had to close it then locked up and shut off, and never turned on since.
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StephenSchiffli
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StephenSchiffli
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1 Solution
 
Huseyin1Commented:
Is the graphics card on a slot, if itis not built in on the MoBo, reseat the card and check connectors then try again. If you do have another PC near by, try the monitor on it just to make sure it can work.

H
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Cee VeeCommented:
When pushing your power button, try to hold it a while for a few times.
Don't hold too long or it will turn off again.
Did you get any beeps from the system? or totally quite ?
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StephenSchiffliAuthor Commented:
monitor works fine, the graphics card is on MoBo, and it is totally quite, none helped.
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Cee VeeCommented:
that's a tough one.
To troubleshoot this, you have to isolote each hardware component one by one.
I assume you don't have the equipment to read out the trouble code from the mobo so we are not taking that route.

Instead, you can start out with the CPU since you mentioned it wasn't likely to be the power supply. Because it seemed to be a power supply problem.

I suggest you to remove the CPU, then power the system on. If it behaves the same, chance is the CPU. Sometime a defective BIOS cause this problem but usually you get some beeps. So is the video problem.

If the CPU is not it, move on to the video. Install a test video card (from an existing system, or buy one)

I hope this helps,
Good luck!
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StephenSchiffliAuthor Commented:
Well, when i take the cpu out and turn it on is does nothing.  Also i tried a different video card with the cpu in with no luck, and my cpu from my other computer will not fit the broken one.  So, it might be the cpu is bad i guess,  but i wish i had a way to check first. Thanks for the help.
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