Wes KC9TNH has a good idea there, about the hidden menus. And it reminds me of how I solved my own 817 problem. I'm no guru, but I bought an old 817 last year and the thing just didn't seem to work on HF at all. I fiddled with it for a day or two before I had the idea of doing a full reset on the 817. Google "full factory reset FT-817" and you'll find instructions. I also had to replace the third-party internal battery pack, which had some problem I never did understand. Once I did both of those, the 817 sprang to life and works normally. Fun little radio! 73 GL --ken
I have a FT817 also. The maximum power output is 5 watts with an external battery ( no power icon). The icon shows for the lower steps.
I run mine with a LDG z11 tuner and a 9 AH external battery. The whole setup fits in a small hard shell camcorder case.
The only thing that could be better is a FT857D, which DOES do 22 watts.
Glad that you got it figured out. Enjoy!