There is XPS 1330 brought no boot. After change VGA to G86-631-A2 laptop boots but when installing VGA driver after restart windows load then blue-page with 0x00000116 error. Bios sewed and upgraded to last version(A15). Graphic driver from dell website first release(A02) . but still same. L38-L45-L53 changed with working one. but still the same.

Try with Nvidia webpage drivers or with a live cd just like ubuntu.

Good luck

What about soldering G86-631-a2 ? Is chip soldered good ? What datacode of chip ? Maybe chip is not original, or you have some troubles with soldering.

VGA Chip changed and works fine. VGA chip was faulty. Case closed.