As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPLY LIGHT DOES NOT COME ON AND TEST LIGHT WILL NOT ILLUMINATE. REPLACED SWITCH BOARD AND FUSE F401. REPAIRED. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. REPAIRED. REPLACED DETERIORATED RESISTOR R477. INSTALLED HEATSINK BEHIND TRANSISTOR Q415. FOUND WEAK POWER OUT. REPLACED CAVITY TUBE V101.REPAIRED. ADJUSTED FREQUENCY AND ALIGNED RECEIVER. BENCH CHECK GOOD.