Second hand iMac, missing screws and chasis ground
Hi.
My brother bought a used 27” iMac mid 2011 in working conditions. The previous owner removed the hard drive to keep his information. When I opened it to install a new one, I noticed that the logic board had almost all it screws missing and had only one screw securing it in place. Beside this I put the HDD and it works ok. Now my brother told me that the USB ports were not working and does not turn on. I opened it and noticed when I turn the iMac on, the CPU fan spins and stops continuously; removed the power supply and found some burned capacitors. I decided to replace the logic board alongside the power supply and the same issue persist, the CPU fan turns on and off continuously and only the first light of the four diagnostic LED’s on the logic board is lit. My question is: does the missing screws on this iMac had to do something with it? Will this be a ground issue? Am I missing something? I really want to fix this iMac for my brother, he has visual problems and I’m sure this iMac will be a good piece of assistive technology for him.
Thanks in advance for all the help.
Joel (@t888)
1条评论
Hi.
Thanks for responding. I’ sorry for not explain my problem in a better way. Yes, the iMac was in good working condition when my brother bought it, and only a new HDD was added because, like I said before, the previous owner keep it. The problems with the USB came nearly a year after. I bought he PSU in the iFixit Store when I found those capacitors burnt out.
I don’t think this will matter, but, when my brother bought this machine, it came with a Core i5; the logic board replacement came with the Core i7. I know this was the top configuration of this machine when it came out, but; could it be possible the CPU, either the i5 or the i7, were the cause of all this mess?
由 Joel Estrada 完成的