Problem with motherboard

Hello,
I have an acer aspire 5535 atlon 64x At first it became very hot and went off I gave it to a technician and he said it was from the heat sink and so needed a processor paste, we so and it worked. i developed another problem again, this time they say it is from the display IC. i tell you any time it goes off i will have to go and heat the display ic with a blower as i am talking to you know it has gone and this isn't the second or the third time it's about the 20th i tell you . now i am confused and afraid that i might lose my data. they tell me the motherboard is weak. if so is it possible to buy some from your end? or you have another alternative for me. let me hear from you a soon as possible pls.