I have an XPS M1530 that had a problem with LCD. Actually there is no warranty. Its LCD showed noting one day I powered it on but the system booted. I tried to close and open the lid and it showed a black band on the right, actually showing a good windows layout at resolution 1024x768. The GPU had no resolution more than that and there were no back light. But when I plugged an external display, it showed the picture without any problem with higher resolutions. I brought it to a repair shop and they said to me that there was a problem with GPU and its heat sink. They repaired it, but now, it's back. I opened the bottom covers and there is no sign of bad conditions on the GPU. Also, O checked diagnostocs and it reported Error Code 2000-0321. LCD EEPROM was not detected or something similar.
Anybody can help me?
(sorry for my english)