[QUOTE=ricoman;2681066]A few weeks ago when I would boot up, my monitor would hum. The humming stopped, but around that time I notice that some of the text looked odd, like it was very low definition. Some lines of text would look OK and the next looked weird. Sometimes it was fine other times not. I assumed it was the monitor, so when I saw a nice BenQ on the 'egg, I bought it. The monitor looks great, but the text issue persists. Now I’m wondering if it’s my video card (ATI Radeon HD 4870). The device manager says it’s working properly. Any ideas? I already spent money on a monitor I didn’t need and I don’t want to start replacing things willy-nilly. Thanks.[/QUOTE]
Check your drivers to see if they are up to date…otherwise it does seem to indicate since you try a new monitor that the GPU is reaching it life span usage. Beyond growing dust bunnies and if that is the case taking it out and blowing out the dust bunnies will help cooling but if the GPU is ready to take a retirement no amount of cleaning will do and you will end up getting another GPU in the end.