I have an HP Pavilion a6112n desktop computer with Windows Vista Home Premium connected by VGA? (blue) cable to a Dell ST2220 monitor. Everything was fine when all of a sudden my monitor became difficult to read and there's a flicker on the screen, particularly when looking at the desktop or the opening start box. I can read most of the black print, but other print got very thin and faded. You can't even see the outline of search boxes, and the address box at the top shows some readable print like "hp.com" but the rest of the address is very very pale gray. My desktop background photo got washed out and also looks yellowish.
I thought it was my monitor, but I took the monitor to the office today and connected it to my office computer. Came on fine - no flicker and colors are great. Now I have no idea what to do next. Would appreciate any help. Thanks. (Not a computer expert!)