My macbook reacently started showing the great "white screen" of death, i tried all the method to resolve the problem but nothing worked after checking all youtube videos abt the problem and asking apple customer care, the problem was the gpu. Since replacing it is hard i just thought the best solution is to get a new motherboard. So please if you have one for sale halla me abeg i really need it 08168249202, 0809 702 1409 thanks

Before you condemn your system's gpu, uninstall all applications/drivers installed prior to the beginning of the problem. Infact remove recent system changes made and scan the computer for virus.
The problem can come from system hardware like faulty ram.

ErasmusCOMP:
Before you condemn your system's gpu, uninstall all applications/drivers installed prior to the beginning of the problem. Infact remove recent system changes made and scan the computer for virus.
The problem can come from system hardware like faulty ram.

For those year of MacBooks there actually was an issue with the GPU. Absolutely nothing to do with viruses.

@Salimmuhammad
https://www.apple.com/support/macbookpro-videoissues/
http://www.macworld.co.uk/news/mac/widespread-2011-macbook-pro-failures-petition-lawsuit-repair-programme-3497935/

I know that in Nigeria it will be difficult to find someone to fix it

OP, there's a free repair program for this issue. You need to send the MacBook abroad to someone who can get it to an apple store.
This is a more economical option than buying a motherboard that is not likely to be new and would still develop this problem.