All same symptoms as posted by bkenn 0n 2-12-08 additionally noticed that the light shifted to seady if the 24 pin connector to the motherboard was unplugged. This cause me to hesitate just a bit in thinking that the power supply is the problem. Just maybe the motherboard is the cause ???
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The power supply is very inexpensive and can most likely be bought from any of your computer retailers, Amazon - Just make sure to confirm the right model type of power supply. BEST to have it tested before replacing it. To make sure that is the issue.. Many computer shops will test for free.
Most computer testing facilities will test your current power supply for free. A replacement is very inexpensive to replace. Bestbuy, MicroCenter, small computer shops and buy replacemnent from Amazon.com, newegg.com.. Just make sure you have the correct information for your replacement. The model number on the power supply would be your best bet in most cases. Good luck and have a great day. I buy power supplies as low as $15 dollars Generic
plug your pc directly to your wall outlet and see if it turns on. If it works, then the problem is your power supply. If power supply has a reset button, press it and try again. If pc does not turn on when plugged to wall outlet, then power supply for pc may be out.
The blinking light is telling you something about the PSU. First check any AC mains voltage select switches for proper setting. US should be 115. Second if you have a multimeter, you could test the PSU for voltage. Disconnect all power to all components. remove all components from the board including cpu, memory . Leave the PSU only plugged into the board. Press power. If the fan turns on then it's not the power supply. The brand power supply isn't the best, I've seen where you need to wait for 5-20 minutes for the blinking to stop, at which time it will fire up. Now, if it doesn't power up, then it's most likely the PSU.
Do yo have a volt meter or an atx psu tester? you can check voltage to see
If a power supply is bad, your pc will turn off or/and turn on and turn off. As long as your system is running without and shut downs your good.
However if your pc is turing off, I would change it as soon as you can. basically what is
happening, when you unplug everything there isn't much of a draw on power
so the light remains steady, but when you plug devices in there is a
draw and the PSU cannot deliver.