auto turn off for the first 3 times then open

hello i have a fat 80-gbs ps3 and when i open it for the first time it blinks yellow once beeps 3 times and then blinks red but it is not ylod at all as after trying to open it 3 or 4 times it opens and then i go to see the temperature and it is about 59 and 55 for the cpu and gpu respictively if i play a game without turning on a program for increasing the fan speed like webman fan cntrol the temperature during fifa 16 for example becomes 79 and 72 for cpu and gpu but with fan control it only works if i make max temp 78 any temp less than this the ps3 turns off spontinuosly if i open bf4 and remained in menu the ps3 wont turn off ever but if istarted playing it turns off after 5 min i tried increasing the fan speed but it keeps turning off i dont know what is this problem any help