A few things. Does it beep when it starts up? If so, how many beeps? Try removing one stick of ram, then reboot - then try the other. I can think of a few more things, but see how that goes. <div class="gmail_quote">On Nov 10, 2007 11:13 AM, Mark M Lambert <<a href="mailto:mark+linux.ubuntu@marklambert.net">mark+linux.ubuntu@marklambert.net</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hello all, I know this is not a Ubuntu problem but I don't know who else to ask. My desktop PC has died, or appears to be brain dead. When I power up the power supply appears to work - all the fans come on, I can open and close DVD drawer, and the power LED illuminates, but then the PC just sits there. Screen remains black, no hard disk activity. I think the CPU is cooked, but no idea how to test this or isolate the problem component. Can anyone give me ideas, or does anyone know someone in Sydney I can take it to that won't rip me off. Thanks heaps Mark -- ubuntu-au mailing list <a href="mailto:ubuntu-au@lists.ubuntu.com">ubuntu-au@lists.ubuntu.com</a> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-au" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-au</a> </blockquote></div> -- When one burns ones bridges, what a very nice fire it makes.