Chosen Solution
Has anyone encountered the replacement of a screen impacting the speed of the machine? It doesn’t make sense to me, but the only thing done was the screen replacement, and now the machine runs incredibly slow. The machine ran fine with the cracked screen, and not so much with the new one. I bought it from a reputable place, and they are willing to ship out a replacement screen, but I’d rather not do that, unless the screen could impact the performance. Thanks in advance for any thoughts.
The screen has a thermal sensor which if not responding SMC will go into Safe mode lowering the processors clocking. The easiest way to verify this is to use a good thermal sensor monitoring app like TG Pro. Update (10/09/2017) Here’s a snip from the schematic of the thermal sensors:
T-CON & LCD are both on the display assembly.
I’ve had issues with the 2012 iMac LCD LVDS cable not being seated properly. If it’s not seated 100% correctly it could impact your performance of the LCD. You could buy the LCD adhesive kit to try yourself but It’s very annoying replacing the cables as it requires a lot of patience. We test our screens 3 times just to ensure we do not have to open the thing up again… Was your hard drive touched at all? Run Smart Utility to test your drive. If it is failing that could also be an issue. [linked product missing or disabled: IF174-005-1]
