Initially they said that I could not get this by email. I wanted to find out the exact details of what's wrong with the Logic Board and waited to hear from them for two days. On Monday the Apple store informed me it was my Logic Board. It has lasted just 1.5 years and as a student I just don't have the funds to get this fixed (could probably get a decent PC for that money). Instead, I get an email advising me that I have to physically go to the store to get the technical details of the fault.This is so disappointing. I wanted the technical details of the fault emailed to me so I could get a second opinion. Today I was advised by a store personnel that it was a 'Logic Board ' fault and had to be replaced (costs approx 400GBP). This time I was advised that the technicians would run a detailed diagnostic test and they suspected that it was a Logic Board or RAM issue. But it wasn't the case and I had to travel to go again. I was advised to delete Sophos and everything would be fine. I recently took it to Genius Bar in UK and was advised it was a 3rd party conflict (Sophos anti-virus) issue. However, after not bothering with it for many hours (busy with work) I would be able to turn the machine on and use it for 5-15mins and would experience another kernel panic. Started getting kernel panics recently and after every panic attack the machine would beep 3 times repeatedly. I purchased my Macbook pro 1.5 years ago in Aug 2010 (did not purchase Apple care for extended warranty).

Apple macbook pro gpu panic sierra