MBP 1,1-10,2 MBP A1226 2007 820-2101 GPU

[Fieldy1999]

Hi all,

I could do with some help.

I have recently replaced a failed GPU (thanks to DosDude1 video) on my MBP A1226 but it still doesnt boot.

I hear a chime, fans and drive spin up but no display. I have also plugged in a vga moniter with the DVI - VGA adapter but still nothing

Now what i cant figure out is if the GPU is the issue (most likely due to my soldering) or something else.

I have read you can check the GPU chip is soldereding correctly using JTAG but i have no idea where the JTAG connections are.

Any help or thoughts would be much appreciated.

Thanks