Hi All wondered if anyone can shed a light on this. iMac mid 08 recently went capput. Was working fine then restarted itself suddenly. It did that a couple of times so I ran through Disk Utility and repaired permissions etc all seemed ok and passed checks, upgraded to El Capitan latest revision and left it a bit. It then restarted itself again only this time failed to boot. Its now stuck on permanent white screen post chime. Tried PRAM reset - which results in the mac restarting but again sits on white screen. No other keyboard functions appear to work, cannot boot to install DVD, Hardware check etc. Eject does not work so cannot remove install media. Right click does not eject either. I have removed HDD and booted with NO HDD present - same issue. I have removed HDD and replaced with new HDD - same issue I have removed RAM individually, when removing both I receive beeps indicating no RAM. I have disconnected all devices other than power lead again with no success. I have unplugged completely for at least 15 mins to reset SMC. Fans spin fine, green LED light on board when connecting to power. Any suggestions to resolve? I realise this is an old machine however up until now its been a rock so I'm hoping there's still life in the old dog yet.