I have tried to search for a solution to this problem but with no luck. So I am hoping someone on here can help me. My Machine: Fedora Core 3 AMD 1800 XP ASUS A78NX Deluxe Mother Board (on board dual lan/ on board 6 channel sound) 512 MB DDR Ram 60 GB Western Digital HD SONY DVD Rom Yamaha CDR/CDRW Floppy Drive TV Tuner Card (WinTV) ATI Radeon 8500LE Video Card Problem: I start up my computer and it is useable and normal. I can go about my normal routines. I can even ping the linux box from my windows based laptop and I can even SSH into the linux box from the laptop as well. Like I said everything is great. But after a few hours of inactivity (usually once I got to bed and wake up the next day) I find that the box is hung. The monitor just says that there is no signal. When I try to ping the linux box from the lap top I get host unreachable. When I try to SSH into the box I get host timed out. I then have to reboot the linux box (by pressing the restart button) and once it reboots it is fine once again until the next time it hangs. I initally thought this might be a power management issue but double checked that stuff and its all disabled. Anyone have any thoughts as to what might be the problem? I would appreciate any suggestions, Thanks, Colin