• The fuse (not shown in image) above the Schottky Barier Diode is OK, +12V.
• The Diode has a small 0.25 V drop, 11.75 V measured on bottom side.
• The 75L05 regulators to the right have a bad input voltage, 3-4 V for the top one and close to 0 V for the bottom.
• The power LED all the way to the right turns on after a while but is a bit flickery.
• The input voltage on the CX8825 is OK, 11.75 V. Both SW pins are at 5 V.
• The plus side on the large capacitor measures 11.75 V. The minus side is at 0 V, so I suppose this is a smoothing capacitor between VIN and GND.