Hello there. I am Spiros from Greece and I own since December 2015 a Nikon F4 analog camera. A couple of days ago I realised that I had a weird spot inside my viewfinder display. It seems to be a spot at the LCD illumination window (finder side) and as you see in the picture attached it is between the shutter speed indicator and the over&under exposure level indicator. Is anyone familiar with this problem and if so can you provide me with information concerning the repair. Thank you in advance!