I bought Sony vaio VGN-CR36G two years back. Recently i started experiencing auto shut down in mid function mode. I thought some software problem tried restoring it restore point option. still problem persisted. I took it to sony service centre they are telling that motherboard has to be replaced as its malfunction due to excessive heating. I have used my laptop very optimially how come this problem has occurred and on top of that it will cost me exorbiantly. Please advice.