I brought my iMac for $794 at the CompUSA in New Jersey near the Freehold Raceway Mall. It is a 500mhz, Graphite iMac with a DVD-ROM drive and 128mb of ram with a 30 GB hard drive. Now there are two iMacs left for $499 each at the CompUSA. now the problem is that sometimes the screen doesn't show up when you start up the computer. After restarting and shuting it down about 15 times it started up perfectly. I then installed Mac OS 9.2 and Mac OS X (10.1) The iMac originaly had System 9.0.1. Well after that we moved it to our summer house. But the problem happened agian there. But then it started up. After our weekend at the house we brought it back home to our main house. Now it seems when ever we move the iMac the screen dopesn't want to turn on. So when we got home last night. I turned the iMac on and it happened agian. Th escreen wouldn't show! So I hooked up my old Apple 17 inch display to the back of my iMac. Now when I started up the iMac the screen showed on the external display only. So when the screen was up I went to the Display Pane in the System Prefrences window and changed the resolution to a bigger size. The external screen changed but the iMac screen was still dead balck. So I tried to put the resoulution ack and the computer UNEXPECTEDLY SHUTS DOWN! I tried to start it up from the Mac (since the Pro keyboard doesn't have a power button) when I pressed the button it blinked but then went off, pressed it agian and the same thing happend. I un-hooked the external display. then I un-pluged it twice (the iMacs power wire)and then it started up, I clciked the mouse button despretly for the iMac to turn on. It did with the screen and all! Now I am typing this to you to see if I should leave my Mac home or return it to COMPUSA (I have a 3 year warenty with the iMac there) or should I call Apple about it and get it fixed. I fI return it to COMPUSA I fear that I wouldn't be able to get a great iMac for the same price! with a DVD player. I see Apple has my same iMac on sale but without a DVD player! What should I do? Sould I keep it and put up with the problem, I have decided to ask you guys first. Any Help!?