Solved: Computer turns on and off

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mwredt

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Mar 21, 2005
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When the power button is pushed my friend's computer turns on and off repeatedly and will not boot up. It is a Hewlett Packard running Windows Vista. Does this sound like the power supply?
 

TheShooter93

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How to Access Safe Mode

While the computer is turning on, tap F8 repeatedly until a black screen with white text appears. Using your arrow keys highlight the option Safe Mode and hit Enter.
 
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From the sounds of it, he is not even getting to the post screen. If this is the case Safe Mode won't help. It could be the power supply. Could you please Post the Model Number?
 

mwredt

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You are right, I don't even get a post screen.
This is an HP Pavilion p6130f PC. It has an AMD Phenom X4 9750 processor, 8 GB memory, 750 GB HHD, a DVD burner, NVIDIA GeForce 9100 integrated graphics and running Windows Vista Home Premium.
 

crjdriver

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The specs show a 300W pw supply which would be pretty marginal even when new. That system is far past being new; the very first thing I would do for troubleshooting is to jump in a known good pw supply. Note you do not have to fully install the test unit; simply connect the atx pw, aux pw and hit the ON button. If the board successfully completes post, then shutdown and fully install the test unit OR a new pw supply.

Note known good does not mean new; it means a pw supply that was pulled from a working system that you know works. Many people have been tripped up by a new pw supply that was DOA.
 

mwredt

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Mar 21, 2005
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I do not have either a power supply or a tester but I have a power supply ordered which should be here about Friday. I had it ordered because I am getting parts to build a computer for myself. I have a tester coming at the same time so by Friday I should be able to tell if that is the problem. I'll post my results as soon as I know.
 

mwredt

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Mar 21, 2005
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Well, I got the new power supply and installed it in the computer but it does the same thing; starts and runs about 2 seconds then shuts off for about that long and tries to start again and just keeps doing that. What would be next? CPU?
Motherboard?
 
Joined
Oct 25, 2010
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Hey guys.

I have this exact same problem too w/ a barebones kit I just put together from TigerDirect. I'd be curious to know what the solution to this vexing problem is too.

How can I tell if the 450W PS is at fault, or if I have a cheap Gigabyte motherboard that is DOA?
 

crjdriver

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Generally cpus are pretty hard to hurt unless you overclock/overvolt them. I would suspect the mb.
 
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