I have a 2009 27" iMac with the typical GPU problem, several vertical lines and strange refresh artefacts and can only boot in safe mode. Yesterday I tried the oven bake (10 minutes at 200 deg C) and put it all back together, I destroyed the vertical sync connector but apart from that it went ok. However, the GPU is now worse, when I boot it chimes then the whole screen is covered in vertical stripes of many colours then after a while it goes white and that's it. Trying safe mode makes no difference except the stripes are displayed for longer. Is there any point trying the bake again? Should I just accept it's death and wait for hprzfully new iMacs at WWDC? Thanks in advance for your help.