Hi there, I recently got given a Imac g5 to try and repair for a relative, I turned it on to find that all it does is display a white screen and then after a couple of minutes the fan turns on full speed. I have tried many things to try and fix this, I tried to boot from CD/DVD by holding the C key (nothing happens). Safe mode doesn't work, the only time I got another icon to appear on screen was buy holding T on startup to get into Firmware boot but still that did nothing. So I began taking it apart after about 10mins I realised it was the hardest ********** thing to take apart, after resetting the CMOS battery, unplugging all cables etc, resetting ram nothing. Ready to put into the bin any one for any ideas ? Thanks in advance Jack.