Chosen Solution
Hello, I am dealing with very strange issues. My macbook started to behave in very strange way. It all began at the day I have took it from repair. There was flex cable changed and mainboard lighting chip replaced. That day, last friday it started to have strange lags which were only on battery, not during charging. I deleted only a .plist file and it worked fine for few hours. After few hours it started to drop wifi and fans were going so hard (over 6000 rpm) Wifi works fine only after boot, for about 20 minutes and ther there is no connection. Wifi is on but system info is telling me that it is off. I don’t really know what to do now. I am really confused because of that situation. Before it was everything working well. Thank you in advance Maciek Update (09/11/2017) Wifi Problem There is WiFi on but if I check system report it shows that WiFi is off. I can’t guess what is happening here, and it makes me so nervous, just because I can’t work online what is quite important to me. There is also another problem When I run geekbench it showed me that showed me ~1500 pts single core ~1504 pts multi core The first one is normal, but second should be around 2100 as I got while I was running it before giving it to repair after short circuit Update (09/11/2017) Reinstalling system did not change anything. The problem returns Reseting SMC and PRAM also doesn’t work I also written a message on facebook to the place where they repaired my mac Update (09/14/2017) Problem solved!!! I mounted a disk caddy instead super drive and my macbook started to work as before. I have faulty hdd connector. I realised that voltage on battery is to low so at certain moment system was going crazy in order to avoid short curcuit. Now everything works fine!
Take it back to the repair place. Issues like what you’re describing are common when the technician forgets to apply new thermal paste, or applies new thermal paste very sloppily, during motherboard service – which you have had. The fans are going full blast because you have overheating components on the motherboard.
81 C is perfectly normal. What chip did they replace? The ISL or anything to do with charging can cause this. Could you call the repair place and get us the component number they replaced?
