Hello, I have a compaq R4000 laptop giving me some trouble. The computer was running just fine a couple days ago but when i turned it on today, the computer gave me a beep code of 3 beeps and a blank screen. I'm not exactly sure what happened but i think it could be a video issue. i tested the hard drive, power supply, and memory, all seem to be working just fine. I'm hoping it's not a motherboard issue but if that's the case than i will change it but I need to know for sure. any help would be much appreciated.