How do you find out if your motherboard is bad
This computer is a 2011-12. I knew there had been some raiding of parts, but this continued to work for my eBay job. I bought a new MacBook Pro a year and a half ago, but this just works better for that. I had someone with good reviews look at this one. He put in a new hard drive, downloaded a later OS, and replaced a. memory card. It worked for 3 days, then again would only boot halfway. This was why I took it in although now there were additional things. One was a bright red screen which then became black and white pattern resembling big stair steps. I'd had trouble with 3rd party battery replacements, so had gone back to the original and just adapted that I had very little battery life, so I put it where I could keep it plugged in. The original repairman told me he had not replaced the battery after I noticed it doesn't depress in the upper portion of the trackpad. He didn't offer any other help, so I spent another $100 for another repair shop who stated he doubted guy #1 had done a complete diagnostic. I had done the online diagnostic-extended and saw no trouble found. Guy #2 said he did the diagnosis and it's the motherboard and the video. Now, I have used the key-logons in different combinations and have been able to do eBay work sporadically!! I've likely wasted $325.00 but I really work well on this computer compared to the newer MacBook Pro. Another ?: Would he have taken parts out of the computer for the diagnostic or just have done what I did?? Thank you guys so much for all your help.
MacBook Pro 15″, macOS 10.13