A friend accidentally crossed the positive and negative cables while installing a new battery on his airplane and turned on the avionics switch. He did not notice any smoke or burning smells, but after correcting the cable connections, the SL-40 and the GTX-327 don't work. After reading about Garmin's flat fee policy, I decided to open the units to have a look. The photo below is the SL-40 circuit board. My question is, is the substance under the 3 capacitors evidence of melting/burning, or does it appear normal (some kind of insulation)?
I tested the internal fuse in both the SL-40 and the 327 with a multimeter, and they both appear to be blown (no continuity).
Thanks for any help and input.
I tested the internal fuse in both the SL-40 and the 327 with a multimeter, and they both appear to be blown (no continuity).
Thanks for any help and input.