I just retrieved an Altair 8800B from long term storage. I blew away
the dust, checked for loose connections, and finally powered it up.
Lights flickered to life, and then smoke poured from the front panel.
I pulled it apart, and found a very crispy capacitor number C4 on the
front panel card. My first problem is that this capacitor is so crispy
that I have no way of determining the proper value. It is (was)
connected to a voltage regulator marked "F 79MO8 AUC 7535"