My Macbook Pro 2008, 2.2ghz machine is having issues, and it's time to turn to the forum for help. About a year and half ago, my old machine would boot, freeze, and after each consecutive restart, freeze again earlier and earlier into the process to the point where the spinning dashed circle would just stop. At the time, I was running 10.8. The apple hardware test indicated 4SNS / 1 / 40000000 th1H128.000. Apparently this is a thermal sensor issue. Despite this, there my research indicated it may still be related to well know GPU issue. However, there were no screen lines or other GPU typical indicators. I love the keyboard on this model, and given it wasn't going to be used for anything cpu intensive, I decided to do something about it - so had it taken to the UK and fixed at BGA REpairs (even though I live in Australia). They confirmed the GPU was faulty and fixed, following which the machine booted well. Upon return, it ran well on a new install of 10.6.8, upgraded to 10.11 and thats when it all started again - it would get to the boot screen, and need restarting, with each restart shorter and shorter before the next freezing episode. I left the machine for another week or two, clean install 10.9 ( I was reading that despite 10.11 being on the approved list for my machine that it may not work on anything past 10.10?) The machine has for around 5 or 6 hours use total, been fine and now its' all happening again. It has had a history of the GPU diode always running hot (this model is notorious for it) up to at time 89 degrees C. In the past the fan's would always be whirring quite noticabley, but just today - the last time the machine has frozen, I could open Istat fast enough, but the fan's weren't working. If anyone has nay thoughts, I'd really appreciate it. I'd love to keep this machine active, hopefully for not much more than I've already spent?