I have compliled a gauge that includes 4 fixes for Captain Sim B737-200/ADV.

1. APU and Ground Power (CS737_ApuGenGrdPwrMod)
2. Autopilot Disconnect buttons on both yokes  (CS737_ApYokeDisc)
3. Autopilot Disconnect Warning Lights (CS737_ApButtnLt)
4. Yaw Damper Light (CS737_YawDampLt)

Each gauge can be selectively installed in the panel.cfg file.
A simulated charging circuit that will charge a flat battery is included.

Now available in the Avsim Library, search for: Boeing 737-200/Adv Various Fixes