Hi, My old iMac G5 still works quite well considering its age, but it has one major flaw: it isn't able to awake when it's in sleep mode. In fact, there's no reaction at all when I try to get it out!? It is as if it was turned of, but there still is a slight fan noise. Even the start/restart button becomes inactive. Pressing and holding it won't shut the iMac down!!! The only thing, that works for me is pulling the power plug and putting it back in! After that rebooting/restarting is no issue. Here are some technical details for the iMac: - Processor : 1.8GHz PowerPC G5 - Memory : 2GB DDR SDRAM - Graphics : GeForce FX 5200 64MB - Harddisk : Samsung HD403LJ 400GB - OS : Mac OS X 10.5.4 Thanks for any help!