Macbook pro 15, 820 2915 B, After reballing don't show image

[Noguinfor]

Hey guys,

Reballijng BGA, and after this don't show image. i hear the common sound and no image.. already change the chip twice. i have 0v pin 1 U9000. i think the problem is here..

 

[aprendiz]

Why dont take it to apple for a FREE motherboard replace before touch anything.... This could be a bad solder under GPU, or you move something during extraction,

 

[Noguinfor]

Free motherboard? i don't know are you means... this motherboard has arrived in a store off my boss. and my job is to try repair it.

But ok thank you for the help ...............................

 

[dukefawks]

Clean it up and take it to Apple.