Hi I had this problem for ages and found out that it's the heat putty inside has wore down so I bought some new heat putty and stripped it down put the heat putty round the chip inside put it all back together and it hasn't gone of since you'll find it will turn of once or twice at the beginning of first applying the putty but after that it doesn't turn of any more

Hi everyone I've had the exact same problem and I've fixed mine it is the apu chip on the mother board the heat putty what goes onto the chip has Dis intergrated so bought some new heat putty and mine hasn't gone of yet