Solve : New power supply & motherboard, turns on once, then quits?

1.	Solve : New power supply & motherboard, turns on once, then quits?
Answer» It is a Gateway GT4016, it has other issues since I talked to you, a power problem, wont turn on all the WAY, the fan will run, but wont blue light to the monitor. I have since replaced the power supply, same thing happens, new motherboard, same thing happens, what else would that leave? Prior to this, I had suspected the motherboard, as the audio was lost, & had to replace a stand alone CARD on it to get it going, & the optical drive looked like it was burned out, as it used to burn & play dvds, cds, etc,, but wont recognize them now. After I installed the new motherboard yesterday, it turned on & ran fine for 1/2 an hour, but after SHUTTING down, will not want to turn back on.What MAKE and model PSU ? ? Have you REMOVED the dead optical drive ? ? A faulty one can cause boot issues...

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