Acer 5536G
Graphics display problem

I have bought a acer laptop 2 years back (approx.) and now i am facing with a problem that my laptop graphics display is malfunctioning and when i reported to acer center in Ludhiana they told me that they will be replacing my motherboard but they said that the part is currently unavailable and they show no significant response from their side. I am being suffering with this problem from 2 months back i am totally fed up with service of acer laptops.

I request the authorities that they should resolve my problem as soon as faster so that my faith in acer remains the same as it was earlier.

Thanks

my laptop configuration:

ACER ASPIRE 5536G

serial noLXPB10X0289411C73C2000

windows 7 64 bit