Pete B

I’m struggling with an iMac 2017 21” thats suffering from the high CPU usage. It’s a fresh install and all appears well except this issue has repeated past a clean install (full disk wipe) upgrade and fresh install from USB and then upgrade again to BigSur. Temps are normal but very high fan usage until I installed Fan Control, there is no excessive temperature on CPU the entire system has been stripped and cleaned by me and rebuilt. The chassis is cool to touch and FC is set to run based on CPU core temps and it’s remaining quiet! There is no malware or other malicious/intensive process running except kernel_task and it’s beyond frustrating. Apple advise that kernel_task runs when high temps are detedted on CPU (effectively throttling) but others I’ve read disagree with the Apple statement. Based on my experience noted above I also disagree. I’m wondering if it could be a faulty temp sensor on the CPU (is there is there such a thing?). Like so many I seem to be suffering a problem of unknown origin and am...

Has anyone tried this fix from Masta at all and can you advise more on method and outcome please?

Does anybody have better pictures of the the magnets in place at all please?

I would suggest that there is NO need for screen and MB removal on this phone as the charging port and assembly come out as one piece after removing screws and applying gentle heat to soften the adhesive holding the port in place.

How do I identify the part no’ for replacement please?

Hi All, the sensor cable 2nd in from left on the removed board, does anyone know what it is and where I can get a replacement from at all?

what do you need to solder, pics please…

Step 21, be careful when de-routing the wifi cables. Ensure they are Well away from the logic board when you remove it. The connectors appear to be little more than pushed onto the aerial wires and they can become EASILY separated from the cables if not fully pulled AWAY.

YOU HAVE BEEN WARNED!

On my model 3003, after reaching the end I flipped my bottom case over for dust removal etc and a silver clip fell off. I think it was located on the right (from front) side of the unit. There is another larger one attached slightly further forward. Does anyone know how the smaller one fits back in? It appears to have 2 semicircles cut out of one part which look like screw guides but I can't see anywhere they might fit and nothing I've seen here or elswhere is helping with this. Any ideas please?

General comment, you make no mention of removing the PCB from the DVD drive if it's being replaced. Any particular reason for that?

A few points.

1 could be clearer as to which particular model is being used in this dis-assembly (is this the wifi version?).

2 could do with showing the removal of MB from system (not hard but incomplete without it).

3Can you either go further by demonstrating how to remove screen from mid frame and or identify a supplier of the midframe and lcd combined? This would be particularly helpful as the screen appears to be completely glued to the midframe with no obvious way to remove it.