When the computer wakes from sleep it seems to come up normally but the screen doesn't work. It brightens and there is a line across the top of the screen but it doesn't show anything. If I shut the computer down by holding the power button in and start it up again everything comes up normally.
I have recently assumed care of this computer. In investigating this problem I found that the computer had never been updated. Have since installed all Vista updates. Went to HP site and installed updates (including BIOS), changed power options and am still having the problem.
Do not know what else to do.
Would appreciate any ideas.
Thank you