Q: Hi there, when i press the start button on my G4 twin processor, the light inside the button comes on until I let go when it goes ... Hi there, when i press the start button on my G4 twin processor, the light inside the button comes on until I let go when it goes back off and the machine does not start up. Any ideas? more
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Helpful answers
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Feb 13, 2012 10:57 AM in response to TerryDanielBby BDAqua,Sounds a bit like the Power Supply, but...
If you don't know the model, find the Serial# & use it on one of these sites, but don't post the Serial# here...
http://www.chipmunk.nl/klantenservice/applemodel.html
http://www.appleserialnumberinfo.com/Desktop/index.php
How to find the serial number of your Apple hardware product...
http://support.apple.com/kb/HT1349
How to reset the SMU/PMU on a Power Mac earlier G3, G4, G5 models...
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Feb 13, 2012 12:47 PM in response to TerryDanielBby Allan Jones,If this is a G4 Mirrored Drive Door (MDD) or a FireWire 800 (FW800), this articel might help:
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Feb 13, 2012 3:10 PM in response to TerryDanielBby japamac,If you have a MDD, test the PSU:
D275729F-09DA-4FBB-96B3-BEEEB2C04619.html
Other machines follow similarly.
You can test the Quicksilverusing the following instructions, noting the voltyaghe differences stated below..
Though this article is for a Gigabit Ethernet, the testing is the same as with the Quicksilver, but there are two differences:
http://docs.info.apple.com/article.html?artnum=95064
Two important differences are pin #22 in the QS is +25v (not +28v) and pin 9 is +25v (not NC).
Use the pinout here: