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Apple Computing Products:
macOS - Desktop Hardware
Is the motherboard from my Imac really fried?
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<blockquote data-quote="claudio" data-source="post: 25554"><p>Hi there....</p><p>I have an Imac DV400 (summer 2000 I think) that wont start al all.</p><p>When I turn it on I get just a green led and some Harddrive noises.</p><p></p><p>I tryed changing the battery and resseting the Logigboard but nothing happened.</p><p>I measures the voltage all over using the service manual and a multimeter, and this is what I got:</p><p></p><p>Battery: 3,61v OK</p><p>Trickle voltage at J9: 4,9v OK</p><p>CDO Voltage at C10 with computer OFF: -1,1v OK</p><p>CDO voltage with Computer ON: 24,8v insted of the 21v according to the manual.</p><p>Down-converter: Pin2: 11,9v OK</p><p>Pin 4: 4,9v OK</p><p>Pin 14: 3,3v OK</p><p>PAV-board, Fuse F901 is OK.</p><p></p><p>As you see the only "funny" measure was in the CDO voltage in the motherboard when the computer was on. I got 24,8v instead of the 21v listed in the service manual. Does this means that the motherboard should be replaced?</p><p></p><p>AHH I got this Imac as a present and I dont know if the previous owner tried to install osX. Could this lead to my problem ?</p><p></p><p>Any other sugestion would be appreciated!!!!</p><p></p><p>THANKS</p></blockquote><p></p>
[QUOTE="claudio, post: 25554"] Hi there.... I have an Imac DV400 (summer 2000 I think) that wont start al all. When I turn it on I get just a green led and some Harddrive noises. I tryed changing the battery and resseting the Logigboard but nothing happened. I measures the voltage all over using the service manual and a multimeter, and this is what I got: Battery: 3,61v OK Trickle voltage at J9: 4,9v OK CDO Voltage at C10 with computer OFF: -1,1v OK CDO voltage with Computer ON: 24,8v insted of the 21v according to the manual. Down-converter: Pin2: 11,9v OK Pin 4: 4,9v OK Pin 14: 3,3v OK PAV-board, Fuse F901 is OK. As you see the only "funny" measure was in the CDO voltage in the motherboard when the computer was on. I got 24,8v instead of the 21v listed in the service manual. Does this means that the motherboard should be replaced? AHH I got this Imac as a present and I dont know if the previous owner tried to install osX. Could this lead to my problem ? Any other sugestion would be appreciated!!!! THANKS [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Is the motherboard from my Imac really fried?
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