I think the firmware on my KK board is 1.5, but I don't know what I need to connect the board to the computer to update. I'm going to order a new ESC today from HK so that they all match. Thanks for help.
Yeah, I kind of suspected that, the 3 that are working are HK ESCs and the new one is made by Patriot. The new one cost me $44 where the HK ones are only $16, big difference in price.
I have the Bumble bee 550 btw. Thanks for the help.
I have a quad copter with the KK 2.1 board, I was able to fly it with out much a problem aside from a little oscillation in self level mode, but anyway I recently replaced all my motors due to the difficulty of finding props for the stock motors. After installing the new motors I noticed that...