Often caused by a failing PA MOSFET (typically HTL7G06S011P ) or "cold" (cracked) solder joints on the heatsink-mounted components.
Let’s walk through three frequent complaints about the KT-7900D and how the service manual solves them. qyt kt-7900d service manual
If the radio exhibits software-level issues (such as being stuck in "Killed" mode or having locked frequencies), use these reset steps: Hardware Reset : Power off the device. Hold the button on the microphone and the FM (Function) Often caused by a failing PA MOSFET (typically