I have a Toshiba laptop that was working fine. Lately the monitor is showing strange color lines that seem to be showing a lower resolution and the fonts are also not crisp. But if I put on an external monitor it looks perfect. Strangely there are no lines in the background on the external monitor that is showing on the laptop monitor. I have recently installed the latest driver a few times. Sometimes it works then goes bad again. Running Win XP with 2 Gb Ram.