Eastman 3/4 bass. Got this upright bass from a guy here on talk bass a couple of months ago. Amazing bass but I have to sell it for financial reasons. Comes with stand bag and a French bow I don't know the maker and I think it's fiberglass.
Here are his old post, pictures and more info...
i had that problem once. not sure if its the same but i opened up the electronics and put a little contact spray in there, while doing that i noticed a bad solder so i redid that and the problem went away.