NSM Satellite 200 blowing fuse

Hi Everyone, I have a Satellite 200 built around 1986. it keeps blowing the top right hand fuse on the main board. Before this started I removed the keypad to fix some buttons. I reconnected everything up and powered up it blew the fuse. I have no display on the front now. I guessed it may be caused by a problem I may have caused with the display ( I had to pull wires) So I replaced fuse and did not connect up the display cables. It still blows the fuse any help would be welcome.