Sony Viao boots but no display

[muttalib.xaif]

Hello People,
I have Sony viao laptop and the weird situation of this laptop is it boot normally I can hear the Windows sounds but it don't show any display until I heat it on maximum level.
So I usually heat my laptop like put pillow on laptop's ventilation and leave it for while but now it doesn't show any display. Any suggestions?

 

[jarotech]

Hi, try an external monitor if you have one.