Help, there's a small light spot on screen??

[gregory27]

Hey got a small issue, on my projector panel screen i can see a small spot that's lighter than the rest (looks like a light bubble, can still see the picture but it's lighter than the rest of the picture)of the display??
any ideas

 

[Ehuwiko]

That's known as a hotspot. Without knowing your setup it's hard to say why it's there, but I can tell you from experience that often in the middle of an OHP projected image there will be a hotspot from the center of the fresnel.