Yaesu FT-890 Technical Manual "rf power output fail" Questions

...RF connector, power leads, grounding straps. Based on your post description, a couple of ideas: 1. Since you receive OK, chances are the antenna/cable is good. You verify though with an SWR meter; 2. ...

...RF Output) at Full Power - why? Unless YOU really know/understand Antenna Design, Cable Connections, Have an Bird 43 (or similar) in-line Watt Meter AND FIX the radio NEFORE you use it - DAMAGE WILL ...