1. I replaced the 15 volt fuse with a new one.
2. As soon as I plugged it in again, the display worked again.
3. I tried to run it again, but it blew the fuse and the display went out again. It made a soft thud sound and stopped working. What could the problem be? What part do I need to replace to make it work again?
It was made in September 1994.

The Lump, May 2011