Gateway desktop GT4016, shuts off after awhile, now fan & light turn on for 2 seconds, shuts down.
Replaced: Power supply, motherboard, on/off switch, CPU, bypassed hard drive, optical drive, & memory sticks, still shuts down.
After replacing CPU, it came right on, ran for about 8 hours, shut itself down, played with on/off, eventually got it to power up & work for
another 6 hours, shut down again, now will not turn on.
Before this, substitued line cord, & different outlet.
History on this is I would have to unplug from behind a couple times, maybe more, to GET the power to come on.
The data light would come on, but not the blue light to connect to the hard drive.
I transplanted the hard drive into a similar Gateway, but not compatible, got a blue screen trying to "learn files" but KEPT going round & round.

Anyone think of something I missed?Bring computer to a friends house and power it off their outlet?


 Seen before a home with dirty power causing power supply to wig out in which to reset the system you had to unplug the system, then press the soft power button, and drain the power supply, then plug power supply back in and it resets the hung state and system runs until dirty power condition is met again.

If this is the case, you will want to add a battery backup in line with the computer to condition the power.
It sounds like a faulty motherboard, at least, the same symptoms as mine, which had capacitors faulty on it. You sure of where you got your motherboard?
Has new motherboard, line voltage checked out ok, another pc running good on same outlet for now.

I tested the fan, ok, so not a cooling problem, however the fan used to come on indiscriminatly, so am guessing something is not properly turning on the fan to the heat sink when it gets warm.
I ordered another PCU, as soon as I get it to turn on, am going to find a way to look up the operating temp.
What puzzles me, is a new motherboard, I assume there is something on that to automatically turn on the fan.
(as soon as I installed the last pcu, it powered up & stayed on for 2 days)
There is no video card in the black slot, so am assuming it is intregated in the motherboard.
Are you sure the CPU fan is plugged to the correct header slot ? ?He did not replace the keyboard.
So it must be the keyboard. 

Quote from: Geek-9pm on OCTOBER 30, 2014, 09:39:26 AM

He did not replace the keyboard.
So it must be the keyboard. 

Please knock it off...and think before you hit Post.