Power Supply problem...or maybe not.?

Question

ok...new motherboard (2nd one, thought 1st one was bad), new processor, ram, the whole shabang. built. went together fine no problems. whenever i turn it on, the power comes on for a plit second, and then dies. like i said, this is the second moatherboard. so, i take everything out of the case and re assembly on the table. i put the processor and ram in turned on...ran fine. then the video card...turn on, ran fine. then, the moniter......stoped working and started doing the same thing over again.... what is it...????? my brain hurts.

ok...new motherboard (2nd one, thought 1st one was bad), new processor, ram, the whole shabang. built. went together fine no problems. whenever i turn it on, the power comes on for a plit second, and then dies. like i said, this is the second moatherboard. so, i take everything out of the case and re assembly on the table. i put the processor and ram in turned on...ran fine. then the video card...turn on, ran fine. then, the moniter......stoped working and started doing the same thing over again.... what is it...????? my brain hurts. so now, now matter what i remove or whatever, it does the origonal problem again...split second power and then dies. HELP!!!!!

Answer 1

Are you sure the power supply is good? I bought a new power supply one time to find out it was a bad one.

Answer 2

http://pinouts.ru/Power/atxpower_pinout.shtml
http://pinouts.ru/Power/atx_v2_pinout.shtml
the first one is for the 20 pin connector, the second one for the 24 pin connector. (I mean the mother board connector). remove it from the motherboard and, using a piece of wire (paper clip), short pin #14 (20pin) / #16 (24pin) to the one next to it (#13 or #15 / #15 or #17) or better by colors: green to black! this way, the PS should start (you'll bypass the motherboard's starting circuit) and you'll can see/hear the hard disk(s) spinning and if there is a disc in the DVD/CDROM drive it should spin too for a few seconds. you can also eject/load the optical drive's tray. if the PS works this way for some (say 10) minutes, I suppose it can be declared as OK and the motherboard DEAD.
ELSE, if it still doesn't start or if it's starting and after few seconds stops, remove one by one the floppy/DVD/CDROM/HD molex connectors until either you find the faulty unit or until there is nothing more attached to the PS. if neither in this later case it doesn't start (it's fan should spin merilly), you can dump it to the trash and change it with a new one... it's cheaper than repairing it.

Answer 3

Borrow another monitor from someone to try it out on your computer to see if the monitor is bad. Are you sure your Hard Disk drive is okay? I replaced everything like you and it turned out to be the Hard Drive. I am not sure how to Test the Power supply but if you can turn on the computer without the monitor and it runs I would wonder if the Power Supply is bad.

Answer 4

Your power supply seems OK. Its auto shutdown feature is working. It is sensing an overload condition whenever you insert the vga cable. Something must be wrong with the vga connector to the card, the vga cable itself or the vga line in the monitor. Better inspect the connectors and pins. Something is shorting one of the + power rails. Try a different monitor/cable.

Answer 5

Your monitor may be shot, OR your power supply will turn on the cards, but doesnt have enough power to actually handle the load demanded by the components while its trying to do something, so its either your monitor is messed up, or you need a power supply with a higher wattage rating. if its neither of those i seriously dont know what it could be,

Answer 6

It could be a bad or insufficient power supply actually damaging your motherboard causing it to break. I'm afraid though that really you're probably going to want to get professional input on this. Call the tech support of first your motherboard manufacturer, then if they don't help or redirect you to someone else, try your power supply manufacturer.

Answer 7

What Motherboard, CPU, Video Card, & skill grant wattage, or what's the computer sort and sort huge style. is that this a clean or used Video card, and does it artwork in yet another computer? once you do away with the video card are you waiting to apply the on-board video? in step with danger your PCIe or APG slot has long previous undesirable, if the video card works in yet another computer computer... A 128 MB video card shouldn't use lots electrics, yet you have not presented sufficient info to enable the experienced knowledgeable contributors of Yahoo answer that can assist you with your question. all people can in basic terms grant guesses, extremely than exact assist you, you would be able to desire to furnish extra information... JR

Answer 8

Had this one myself recently and went bonkers till i figured it out...look in the book that came with the mobo and go to the jumper section and find the jumper for the cmos. It is most likely set in the "discharge" position for shipping purposes of not draining the battery. Change the jumper to "normal" and it should fire right off :)

Answer 9

Well, it seems to me that your power supply is being overloaded when you add the power demand of the monitor. The solution for this is simple... DON'T plug the monitor into the PC power supply, just plug it into the wall (or power-strip/surge protector)

Answer 10

errrm,if you going to replace the motherboard then you should know whats wrong already.unless you know what you are doing its always a good idea to let a trained engineer do this kind of thing