Can't believe I just saw this thread.
My FT-7800 is currently down for the count. With only a basic HT I'm not getting out much currently.
Radio was fine a couple weeks ago, then the battery in my truck died. (I was 20 miles from home and at a gas station, so I let them handle the replacement - something I don't typically do.) Anyway, just plugged the face plate in for the first time since the other day, and nothing
I checked the leads to the battery in the engine compartment and they look good. I can't get to the actual radio w/o pulling the seat, though, and its been too cold for me to want to go out and mess with it. Likely be a few weeks before I can look into it. I'm hoping it's one of the line fuses or something simple and there was no damage to the radio internals.
I had the battery replaced in my truck and I couldn't watch them do it. I gave the guy instructions about my radio's power lead terminals on the nuts that clamp the truck's power to the battery terminals. After the replacement and several other things were done, I drove it home without thinking about turning on the radio. When I did it was dead. I opened the hood, everything looked right. After many minutes of troubleshooting I came to the conclusion it had to be the battery connection. I looked again, fiddled with the terminals and found the guy hadn't re-tightened the nut clamping the negative battery terminal even close to complete. I was surprised the truck would even start. I tightened everything myself, then it all worked again.