Chosen Solution
Hi All! Really need some expertise here. I have the same issue as most people here, but on an iMac 24” mid 2007 (A1225). Does anyone know what resistor i should be looking for? I replaced the CPU fan, just to find out it had nothing to do with it. Finally got to this page, but, according to the pics posted, the solutions are for a 2009 iMac…. right? Thx Update (01/28/2021) Also, i had istalled a while ago the SSD fan control and it worked fine…. since the fan gos into full speed the app shows as in the photo….
Well, it shows no info… no temps, no speeds…. nothing totally blanc…. Update (01/28/2021) Here’s the TG Pro outputs:
https://drive.google.com/file/d/1AuoXG6n…
https://drive.google.com/file/d/1gsM5b7g…
Did you transfer the thermal sensor from your old HDD to your SSD? Review Step 20 in this guide iMac Intel 24" EMC 2134 and 2211 Hard Drive Replacement You should also run diagnostics from the original grey disks you got with the system. Did any errors pop? Update (01/31/2021) Well we know the issue is not the fan’s as SMC is working! But we still are encountering a SMC error condition which is the voltage sensor firing off on your logic board likely within the CPU VRM logic area. This really needs serious circuit level diagnostics. Do you have the schematics and boardview drawings for this system? Do you have a good DVM and the skills to read and test at the component level? Your other option is just finding another logic board to replace this one that might be the cheaper solution.
