I have been having a couple strange problems with my computer lately. When my computer turns on it freezes on the GATEWAY bios screen, fan running heavily. At this point I must unplug the computer from the wall and plug it back it. After this on the next boot it works fine. It cannot perform cold boots. And another thing: I have a translucent wormy squiggle line that wiggles like a worm, on my monitor. It is quite hard to see the line but I can see it with a dark background. i don't know if it could be the internal power supply. I recently added 3 sticks of RAM (512MB), a graphics card, and an internal hard drive (within the last few months). Its any other Gateway 420GR except for the upgrades, so if you need more information please Google because I don't know all the specifics of my system. Replies would be greatly appreciated. Thanks.