changing the graphics card in macbook pro

I'm so sorry to hear about all of your issues. which one of the two is the problem? the built in one or the AMD Radeon HD 6770M? I don't know enough about this. I am now trying to find out if there is a way to get a used graphics card.

(One thing that helped me was that I was using Lion and I had them upgrade to OS X. and restarts several times and only SOMETIMES actually boots up but freezes up when I try to open my Photo program. Right now if I do ControlOptionRP to boot up.it shows lines several times. because I have so many expensive programs such as Photo Shop on my computer I will lose them all. I think Apple should have replaced everyone's computer after the first replacement failed. I went to iCare in Chiang Mai Thailand and was told the graphics card is broken but that they cannot get the part from Singapore because it is over 5 years old. I agree, I actually have had to have my logic board replace 3 times!!! and now in October I had a screen panic with lines and I could no longer boot up.

Changing the graphics card in macbook pro