Good that you could get scan to load. It is too bad you can't load pictures. That is very strange that 1 MB images won't load.
There are a few threads that I think are at least similar to your problem. I don't know if anything in them will help. The opening posters seem to not be active here on QB since they started the thread. You might try private messaging them and see if they could help.
Repairing an old White cabinet
Franklin Treadle
Help with Sewing Cabinet Operation
Janey - Neat people never make the exciting discoveries I do.