I have an win xp I purchased a new computer 2 years ago about 2 months ago I
noticed my power light was not as bright as it should be.  Each day the light
go dimmer.  Now you can barely see it.  I tried logging on which I'm able to
do, but once computer is on for 5 mins, it automatically shuts down, no power
and the only way I can re start is to use the reset button and again it will
only stay on for 5 mins.  Is this my power supply?  I tried doing an restore
computer but when I try to do so it cuts off.  Is there somethings I can do
on my own to make this work again before bringing to be serviced