My g4 got dropped and is now silent but still working. i changed the sound card but still no sound. have noticed damaged capacitor near the max 1717 chip. what is this chips function, what is this caps value
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Re: apple g4 aluminium
What sound card are you using? It has to be external for you to switch it. When a computer is dropped, the hard drive and logicboard are under severe danger. The drive is constantly spinning anywhere between 4200 and 10k rpms. If the logicboard endures any shock there could be endless possibilities to failures in addition to them being intermitten. Can you specify which G4 you have, in processor speed and machine/display size? And I take it when you mean " no sound", you also mean no Apple start-up chime when you boot the machine?
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sounds like the video card is dying. I was able to hold off on one dying by downloading a fan controller that kept the machine cooler, but with the age of the G4, it's likely damaged. Consider replacing or the fan controller.
As a 25 years experienced technician, some times I have clients who come to me saying " I have a computer that keeps shutting down randomely " they had it checked by some tech. and he can't find a clue what's going on, even after changing the power supply...
The reason is that the tech did not noticed the swollen capacitors on the main board usually around the CPU or the RAM...
Conclusion! if your computer is randomely shutting down, befor changing any hardware, open the box and check for the physical state of the capacitors (round aluminium cans covered in a plastic shrink) the top are suppose to be FLAT not about to burst.
They can be changed by a proffessional tech. with good tools and lots of patiance (not to damage the feed trough's on the board)
What I would suggest is reseating the airport card as it may be the card has come loose or the cable is not connected properly. The following support page on the apple website will tell you how to do it.
It might be giving notice, it might have some loose screws, but then again, it might just need some oiling.
There's probably a sticker on the rear side of the fan (where the power wires come out), remove it, underneath you'll see an aluminium cover near the center. Take this cover off with a pointed knife or similar, it should come off with just a slight force and you should now see the axis fixed in place by a clamp.
You just need to put a drop or so of oil, just make sure it reaches underneath the clamp into the bearing/bushing and if the bearing/bushing was just a bit dry or dirty and if it's not really damaged then the fan shoud now run quietly.
Put the aluminium cover and the sticker back in place, try it out, if it's silent, you win, if it's still giving notice then it should most probably be replaced.