May have figured out what killed my plane- DX5 power glitch

[CNY_Dave]

Was testing out the servos etc on my new plane, AR6210 RX with satellite, DX5e, when the plane stopped responding. Walked to the front, peered in the hatch, yellow sig light is out on the RX and the lost-link red LED is flashing that it has lost signal once.

Wiggled the sticks, shook the TX, no idea what's wrong. Did not regain link until I power cycled the TX, then it was solid over multiple powerups on TX and RX.

I recall there was someone who had a problem with the power switch on their DX5 (was too sensitive and they had to mod it to keep it from glitching) so I fiddled with the switch.

Sure enough, a slight pressure off to the side or even down could power cycle the TX by briefly shutting it off.

But, that's not what happened when it lost sig.

Fiddled with the power switch some more, and multiple times I was able to get the TX to stop transmitting, sig led on the RX out, but WITHOUT glitching the LED on the TX and without the TX making its startup beeps!

Holy crap!

Would not resume transmitting until it was power cycled.

Seems as though if you cycle the power fast enough the processor (or something in there) locks up but the reset circuit doesn't catch it and reboot things like during a power cycle.

Also telling was sometimes when momentarily cutting power (faster than you can cycle with the switch off-on) when the RX regained the signal the sig LED would flicker then become solid.

I wonder how many planes have gone down because of this? In addition to my flightstar 40 which crashed due to probable signal loss.

I wonder how many brownouts (with a DX5 TX) were really this issue?

Going to have to find that repair thread and see how to disassemble this thing down to the switch.