I believe this is the twin model number to the X1000 Compaq.. If so your issue is most likely the video card. Try pressing the F-8, 7, and 8 keys to apply pressure to reseat the card, Then try to re-boot. If it comes on you have this problem. Weve been getting a ton of these and they are going to be a big problem soon. The video cards warp causing them to pull slightly from the sockets and can cause intermittent boot issues as well as video dropping out and random shutdowns. We designed a plate to sandwich the replacement card and stop future warpage. If you need more help contact us back, You can buy a replacement Radeon card for 239.00 shipped but the issue will re-occur after about about the same ammt of time. Good luck!