Cannot get a clear image thru the eye piece

I got my kit in for doing tear down and repair manuals and hooked up my camera and ran into problems. This is an older camera that's been sitting for about four years. When I look thru the eyepiece it will not focus. The auto focus on the lens appears to be working. I've taken some pictures and the pictures are much clearer than what I can see, which is totally blurred. I've gone over it with compressed air and cleaned the external as well as possible. Another problem is that the pictures are dim and yellow to orange tinted even when using very bright flood lights. Any suggestions would be welcome. The manuals will have to wait if it's "buy a new camera".