Chosen Solution
Hi everyone, Any suggestions you have would be greatly appreciated! Here’s the situation: I just got my hands on a 2012 Macbook Pro 15". I got it pretty cheap because the seller said the computer wouldn’t get past the grey screen or Apple logo when booting. I figured it was likely an issue with the hard drive and bought it anyway. Sure enough, when I put my own hard drive in there, the computer doesn’t get stuck on the boot screen. HOWEVER, it will only turn on if I hold the power button down until I hear the click/whirr of the CD drive. If I just press the button, the SIL will turn on once and then nothing. I don’t think there are any mechanical noises when this happens. Once on, the computer appears to work fine. It’s a little sluggish to boot and to respond to inputs, but that could be because of the 8 year-old HDD running High Sierra (just as a tester), or because the OS was installed on an entirely different machine (2010 13" MBP, 2.4 GHz C2D). Thanks for your input! EDIT: I’ve reset the PRAM/NVRAM and tried resetting the SMC, but I couldn’t tell if anything happened.
Down load this app: TG Pro so you can check the thermal sensors. I’m suspecting the system had a liquid spill and the palm rest sensor is messed up which is why your system is so sluggish and the power button is not working correctly. Let us know what you find.
