G4 MDD power supply Issue

My MDD was recently stop only two or three minutes after a cold start. The power led lights up, the gray screen with the Apple logo appears with the spinning wheel, but then the machine suddenly loses power as if the power cord was disconnected. These are the things I've already tried:

  1. Removed the PRAM Battery
  2. Disconnected all devices except the keyboard and the monitor
  3. Tried a different power cord

Start in safe mode did not help. The fans are all running, the red LED lights on the logic board and disk drives seem to work. This could be a power supply issue or a problem with the motherboard and is it possible that I can definitely identify the problem without being able to start the G4? The startup time has been considering more when everything worked last week, would that be a clue? I've owned this machine for more than twelve years and it put to the test so I wonder if it's time to retire him.

Thanks in advance for any help you can offer!

Hi, looks a lot like a problem of heat from the CPU, thermal paste is usually good for 5 years or more.

It runs longer open door?

Tags: Mac

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