Does a 17" imac g5 logic board fit a 20" imac g5?

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I have a 20" Imac g5 rev b with ambient light sensor model number M9845LL/A.
It was one of the lucky imacs to get shipped with a bad logic board due to failing capacitors. Even though the capacitors show no sign of damage on the logic board aren't swollen though. When I start it up it does not boot and I get no video and the fans are roaring loud to prevent the cpu from overheating. The third and fourth led lights don't light up on the logic board. I tried connecting an external display and the external display gets no video from the Imac g5.

The serial number of my imac is
W852220LSDZ.

I have a couple of questions.

Is there an apple repair extension program for this specific model of imac g5 since it is no longer under waranty?

Would a logic board from an imac g5 17" fit into my imac g5 20"?

Since I have to replace the logic board on it, how about an upgrade,would a intel logic board from an 20" imac fit into the imac g5 20"?
 

dtravis7


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MacMini M-1 MacOS Monterey, iMac 2010 27"Quad I7 , MBPLate2011, iPad Pro10.5", iPhoneSE
If the capacitors are not bulging or leaking I doubt that is the issue. There was at one time a program I believe for boards with Bad Caps.

The 17" logic board is a lot different. I am sure it will not mount in the 20" iMacs case.

The Intel board would be way different. It's more like the iMac G5 iSight in basic layout. The ALS was a way different machine inside.

Is the RAM seated properly? Did you try removing and reinserting the sticks of RAM?

It could be also a Power Supply issue. All guessing at this point though.
 
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thanks for your reply dtravis7.

I don't see how the logic board has bad capacitors if they are not swollen or leaking either, however some people say they go bad without any visible damage though.

I am going to check to see if the ram is inserted properly. We'll see if it is. I am going to try to remove and reinsert the sticks of ram and boot it up again and see what happens.

I doubt the powersupply has an issue because led #2 is on which means the power supply is working correctly.

Could be anything really.
 

dtravis7


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I do have the Service Manuals for those machines so if I can look anything up let me know.
 
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thank you for the information. If I ever need to remove the logic board by myself I will let you know.

I checked the ram and was seated properly in its slot. I removed and reinstalled the ram and booted it up and still got the same problem. I even tried installing the ram in the other ram slot and still nothing.
 
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imac g5 logic board

anyone know if the 17 inch imac g5 logic board fits the 20 inch imac g5?
 

dtravis7


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Your Mac's Specs
MacMini M-1 MacOS Monterey, iMac 2010 27"Quad I7 , MBPLate2011, iPad Pro10.5", iPhoneSE
According to the Service Manuals for both:

For the 20" ALS:
Logic Board
661-3613, 2.0 GHz,
ALS (Ambient Light Sensor)

For the 17" ALS:
Logic Board
661-3611 1.8 GHz
661-3612 2.0 GHz

So based on that I would say no. The 17" is a lot smaller machine and I think there are differences in the layout.

If you want to chance it, above is the info from apples own manuals.
 

pigoo3

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So based on that I would say no. The 17" is a lot smaller machine and I think there are differences in the layout.

Pretty much what I was thinking (different logic board layout = doesn't fit)...but wasn't 100%.

- Nick
 
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thanks for the reply dtravis7

Does part number 820-1747-A correspond to 661-3613?

Dtravis7 Could you send me the service manual for the imac g5?

thanks
 

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