820-2915-b no picture but sound coming out from speakers


New member
Hi. i got 820-2915-b board where was problem with display like always in 2011 15 inch macs. i replaced 3 chipsets but now is no picture at all but i can hear sound on start up. checked two working screens and is not that. also is not a backlight for sure, i checked with lamp. any idea where to start find why i dont have picture but replaced 3 new chipsets?


You fucked up replacing the "chipsets". What are you replacing anyway? Only thing that needs replacing is the GPU on these.