What was found
HF RADIO NR 1 INOPERATIVE, RADIO DOES NOT TRANSMIT OR RECEIVE. ANTENNA DOES NOT INDICATE TUNING WHEN MICROPHONE IS KEYED. NO SIDETONE IS HEARD WHEN ATTEMPTING TO TRANSMIT. TWO BEEPS ARE HEARD EVER 12 SECONDS WHEN MONITORING RADIO. USE OF DIFFERENT TUNING HAD, MICROPHONE, OR HEADSET MAKES NO DIFFERENCE. GROUNDED - YES. NONE OF THE INDICATION LIGHTS OPERATIONAL ON FRONT PANEL OF HF TRANSCEIVER DURING BITE REMOVED AND REPLACED HF NR 1 TRANSCEIVER REFERENCE AMM 23-11-21-000-801 AND 23-11-21-400-801. INSTALLATION AND BITE TEST PASS.