help please!!!!

PROBLEM: pc does not turn on when power button is pressed its like your battery is dead in you r car a dissatifying nothing.
if i pull out the power cord and replace it, a brief flicker occurs in the LED beside the button then nothing.
could it the PSU or perhaps just the battery ...im just not sure how to trouble shoot this.before this it gave me a problem turning on where during the boot it seemed to get stuck in loop and continually tried to run a process until i shut down ...unplugged and tried a gain at witch point everytrhing was fine .
not long after i shut down and well ...im stuck...no juice :

 

How old is your computer?

 

i had this problem not long ago - had to get a new power supply - works a treat now

 

I had a similar issue with an old HP. It was the motherboard.

If you get some power by unplugging/replugging the cord, than it might not be the power supply, but your Mobo.

 

i bought it april 2003
pretty much daily use since .

 

silly but what is a mobo ?

 

Mobo is short for Motherboard. Main Logic board.

Or, the big thingie that everything connects to that is NOT the power supply.

 

yea i sort of put a little thought in to it right after the post and figured it out .
but thanks for being nice with your reply.i put this machine together i'm just not up on the um "lingo" is all . so i think it is the "mobo" the psu is supplying juice i stuck some LED s in there and they all lit up .any suggestions on a replacement?