Starting disassembly on the 7613. It has power, vertical, horiz pos., no sweep, no store.
7633 B152130 gives a flooded screen,
7633 B111088 has no power with fuse intact, and power present at the PS rectifier board input, so needs PS debug.
One of the 7633's had covers with 6 latches and RF shorting edging. no vents. Could make an RF tighter cover for any 3 bay 7xxx with proper vent holes drilled.