Display got blank while watching youtube videos

[jewel1]

Sir' When i used to see videos from youtube sometimes it works normally but sometimes it got interupted i can see only a complete blank screen then after sometime the lap got turn off and restart again. then the same video will work properly. my lap is 5 year old and am using toshiba satelite c650 model

 

[galactigus]

Sounds like it's overheating make sure not to give the air ports plenty of space and maybe blow them out with some canned air.