ATX-1956Fpower supply problem

it may be your power supply : if one voltage aren't good the mother board automaticaly shutdown to prevent damage
or it could be CPU, RAM or motherboard but i think that it's the PSU

Try to check the power supply, if the fan rotates as you turn it on, the try to open it and look for the motherboard capacitors there maybe some leaks on it. but if you have a spare or extra power supply try to change it. maybe you power supply brokes.

short power switch pins on mother board, reset bios, short green wire to black wire on ATX connector with all drives etc.. power cables disconnected to test power supply. i suspect you have a dead motherboard.

Unplug everything but the motherboard and front panel connections. Remove any cards (even the video card) and ram and see if the system comes up (you should hear error beeps and get lights). Install the ram next and retry if the power is up. At the point where the disappears you have found the bad component/ device. If no power lights with everything disconnected but the processor the power supply is bad or mother board is bad. The switch on the power supply is set for your line voltage correct?

Dear,
You can test you smps simply by shorting any of the back wire and green wire. this will switch on your smps withour connecting with mother board. IF it the fan rotate, SMPS is ok.
If you need more trouble shooting on SMPS you have to measure the volate on each wire after powering on.
More info http://www.smpspowersupply.com/connectors-pinouts.html

ok dandan, please tell me you live in nj. I am having the same problem with my puter and did every step you did what is up with this??

Have you verified that the PSU is OK.

DO you have a voltmeter?

Check the voltages on the main connector to the board

HERE is the 24 pin ATX connector

HERE is the 20 pin ATX connector

If the voltages are not there then either the PSU ON signal is not there, the ON switch is faulty or the PSU is dead.

Post back results and I will try to assist furher

angeldram3
as i think ur processor over heated. or processor can dos not work fine or heat sink not installed properly. remove heat sink, and use heat sink component (a whithe colour gel. u can buy it any computer accessories shop) use it top of ur processor then attached heat sink. and connect processor fan. before installing heat sink check processor fan. then cleare CMOS by removeing battery (because this problem also can happen wrong frequency setting in CMOS setting).

Swimmie
to chack ur power supply open all connector from system board and drive. then conect power cable with powr supply and powr on ur wall outlet switch. than take mother board connector find green color wire and take a small pice of coper wire and connect it with this green wire and a black wire. then chack smps fan is moveing or not if it's moveing then ur smps OK.

You blew out the motherboard, cpu & ram may have survived, but I would guess that high of a voltage would have fried the mobo