Tried to take out the GPU and install a Nvidia 9800 GT. It would start up but only for a second, then shut down. It does this repeatedly untill i disconnect the PSU. Now i put back in the old graphics card and i'm still having the same problem.
Anyone have any ideas?
I cannot boot or get to bios. The system just turns on, then turns off, then repeats.
While the PSU may equate to a "Edsel" or worse, Do not be too quick to blame it.
First: Try reseating all MB power connectors, Then remove and re-insert memory modules.
2nd try power on with out a gpu.
A cheap Digital Voltmeter (18 bucks @ walmart) connected to a molex connector will tell you if +5 and +12V are OK. Black meter lead to black center molex pin. red meter lead to red molex pin = +5V and to other end (orange wre is the +12V.
Using a Digital multimeter is so simple my wife could do it (cave man gets to much credit). Just google using a voltmeter and watch a short youtube video.
PS Most store bought computers generally use a PSU that is better used to prop the door open - LOL. SO yes that could be the problem.