it sounds more like a inverter issue.
what laptop do you have?
Thank you for answering.
It´s a Nexoc Osiris tablet pc.http://www.notebookjournal.de/forum/showthread.php?t=9610
The display malfunction didn't appear at once. First it would work
for 1/2 to 1 hour. Then it would start flashing. And finally turn black.
The notebook can be used via the vga port.
What's a inverter?