In a message dated 05/09/2004 16:31:09 GMT Daylight Time, PaulGask@aol.com writes: What make are your PC and monitor, and how old are they ? The monitor is a Compaq, and the computer is a hybrid made from my old Compaq which blew the insides with a power surge. I have turned off the screen saver to see if that cures the problem. FYI this problem seems to have steadily got worse over the last couple of weeks. Robin