Edit: About the port: Try to clean the pins with a metallic brush (for example the ones for cleaning sparks). I had a problem like that (too much blue in my case) and it was just that. If you don't have, just sand paper all around the pins. BTW: Is that a Commodore 2B board? (lift the sticker)
Last edited by Retrofan; 03 June 2012 at 00:10.