u/abacups

So some months ago my Sony tv, which is now pretty old, stopped showing image. I turned it off, then on and the image appeared again, but after a few seconds it vanished. I think the image disappears in relation to how long I've turned it off. Does it have to do with the blacklight? Or the power supply? Please help.

I took apart my PS4, cleared all the dust and cleaned the laser with alcohol. I have watched countless of videos but it still doesn't seem to work. Can I fix it? Or should I just buy a new one?