Do anyone out there know whether the graphics card of this model is on board or in card form so can be easily changed? I had the screen changed a couple of months ago but the shop that done it have told me the screen checks out ok, but there seems to be no throughput from the graphics card to the screen. "Too big a job for us" they say, take it to acer. He couldn't tell me the answer to my question either. TIA. Mashy.