Problem is that notebook is beeping on graphic

Problem is that notebook is beeping on graphic (one long-three short beeps). I heated this graphic chip and notebook start working. After few days of normal workink laptop returned with same problem (blank screen and beeps). I heated 7200go again and it worked for few days...
You think that something else is problem? Chipset?

HP PAVILLION DV6000 (dv6254eu) GRAPHIC CHIP REBALLING