Mac g4 mdd 1.25 ghz boots but no on light, no chime and no video.

Question

Power Mac G4 MDD

This Power Mac G4 has Mirrored Drive Doors.

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David Kievman @alm1ghty55

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Postado: 29 de abr de 2018

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Mac g4 mdd 1.25 ghz boots but no on light, no chime and no video.

I've had the PSU rebuilt. Replaced the battery. Changed the hard drive. Replaced the optical drives. Changed the video card. replaced the memory. Tried holding down the PMU and the on button for 15 seconds, no good. Pulled all the cables and held the on button for at least 15 or more seconds, still no good. What's left besides R&Ring the motherboard and or the daughter board?

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The button your refering to is called PMU and yes I've pressed it many times. I've learned from past experience with other Mac's by holding the PMU button and the start button for fithteen seconds or more would solve the problem. Not in this case.

30 de abr de 2018 por David Kievman

The board your refering to is not my board. I have a G4 MDD 1.25 GHZ Single CPU.

25 de set de 2018 por David Kievman

Just replaced the motherboard. The original had a broken capacitor. Also The PSU was dead so I R&R'd it. boots but has the original problem. How do I know if the CPU is bad?

25 de set de 2018 por David Kievman

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The button your refering to is called PMU and yes I've pressed it many times. I've learned from past experience with other Mac's by holding the PMU button and the start button for fithteen seconds or more would solve the problem. Not in this case. — David Kievman
The board your refering to is not my board. I have a G4 MDD 1.25 GHZ Single CPU. — David Kievman
Just replaced the motherboard. The original had a broken capacitor. Also The PSU was dead so I R&R'd it. boots but has the original problem. How do I know if the CPU is bad? — David Kievman