Sorry my english Hello colleagues, well I tell you ... I was burned an ft-817 for connecting it badly to ground, so I checked it well and found a split voltage regulator and diode D1085 open. I proceeded to change them, but it did not turn on, I did not find another error. Then I prepared to put that repaired main unit on another ft-817 that worked and surprise! everything works ok. But I do not know what can be on the other radio that does not allow it to turn on. Any advice? Thank you!