Hi Everyone,
I have a bad PS from a Power Mac G4 MDD or mirror door machine. I took it apart and found a blown fuse. It blows a new fuse immediately upon being plugged in. The computer works fine with another PS.
So there must be a dead short in this thing somewhere. I have a little electronics knowledge but would like to learn more and get some experience repairing electronics.
I don't notice anything burnt in the PS, but I did notice some diodes of this type:
http://www.cartft.com/image_db/1n4001.jpg
that looked like balloons. Like they had pressure inside them and expanded. They are labelled with a DXXX on the board as in D100, D101, etc. (those aren't the exact numbers, but you get the idea). I've found 3 so far, all in the same area. I've never seen a diode that looks like this. Can anyone comment on that observation?
I also noticed this PS board has some CapXon capacitors and as I recall, I have seen a lot of these go bad on both Dell and Apple computers.
I would appreciate any help to tell me where to start troubleshooting this thing. I have a volt-ohm meter and that's it. Do I need any additional tools?
Thanks!!!!
I have a bad PS from a Power Mac G4 MDD or mirror door machine. I took it apart and found a blown fuse. It blows a new fuse immediately upon being plugged in. The computer works fine with another PS.
So there must be a dead short in this thing somewhere. I have a little electronics knowledge but would like to learn more and get some experience repairing electronics.
I don't notice anything burnt in the PS, but I did notice some diodes of this type:
http://www.cartft.com/image_db/1n4001.jpg
that looked like balloons. Like they had pressure inside them and expanded. They are labelled with a DXXX on the board as in D100, D101, etc. (those aren't the exact numbers, but you get the idea). I've found 3 so far, all in the same area. I've never seen a diode that looks like this. Can anyone comment on that observation?
I also noticed this PS board has some CapXon capacitors and as I recall, I have seen a lot of these go bad on both Dell and Apple computers.
I would appreciate any help to tell me where to start troubleshooting this thing. I have a volt-ohm meter and that's it. Do I need any additional tools?
Thanks!!!!
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