A friend asked me to look at his imac problem - it can't find a system on start-up.
The imac is a white dome model number M6498. 700mHz/256mb/40HD with 15" lcd.
It was delivered to me so I plugged everything in and started up. Sure enough the disc icon with flashing question mark appeared. I intended to then start up from a cd but I couldn't get the cd tray to open. Then after about 5 minutes the thing just shut down. It would not start up again. I tried unplugging all cables and re-connecting but no luck. It refuses to start up. Any ideas please.