Yesterday my 17 inch MBP early 2011 died temporarily while I was trying to make an installation on an external HDD of Mavericks. Green stripes on the screen during the installation of the OS on the external drive. At reboot - I got pink stripes on the screen and then boot screen - white screen (clean) and MBP hanged up. I tried to revive it with no success. Then I saw an article with one guy suggesting to place the mac on a blanket and let it heat up well. Then Try to boot again. This actually worked for me. After booting I got some more system hanging - some more boot failures and I repeated "the blanket technique" Eventually I update the OS to 10.9.3 and afterwards no more glitches. Some artifacts started to show since 10.9.2 beta and kept being there until 10.9.3 beta (some weird quick weird looking graphics at login screen). In the morning I started my Mac - same story however this time I had no blanket. I just turned it off and back on and ever since I don't get anymore glitches. I did some benchmarks and stress tests and ... nothing. It's clear that this is the common GPU issue MMP is plagued with - therefore I decided to take the Mac for a reflow of GPU/CPU. The real question is - if this really works or not? Should I re flow if it doesn't do anymore glitches or wait for the next failure? Did any of you have had similar experience and what did you do?