I just got my G5 dual 1.8 about 2 weeks ago and everything was working fine until last weekend! Whenever I'm surfing the net, it just blanks out and goes into sleep mode??(black screen) for about 5 seconds or so then turns off by itself! However, if i hit my keyboard during that short blackout, it does seem to get back to normal.... except when the picture of desktop comes back on, ethernet has been disconnected. This is strange since i'm actively using the mouse or keyboard whenever i'm on internet. Could anyone please help me with this??? how i can go about fixing this problem??? I have updated my panther to 10.3.3... thought that it might have to do with 10.3.2 but updating didn't seem to help.