The boss had repaired a customer's Sorcerer S-100 box but had no Exidy cards to try. I suggested trying a Vector Graphics card and when he turned it on it went poof. There was some difference in power circuits. The Sorcerer board was dead and I felt terrible. He didn't blame me though. He replaced the customer's board and gave me the dead one to fix as a project. I didn't know enough to troubleshoot it so I desoldered ALL the chips and bought new chips and sockets, and it worked!   I bought a