I've been having some odd problems with my 21" IBM P260 since I got it used but recently they've been worse. After its turned on it will sometimes cycle its focus. slowly getting fuzzy to the point where its unreadable and then snap back to normal focus right after, only to do the same again and again. Other times it will quickly go blury and click back to normal, making a loud pop noise when the focus returns.
As far as I can figure it might be a ground problem, some build up of static charge or maybe a loose wire. Repair advice and help welcome.