[Yaesu] FT900 schematic wanted

[Gilbert Franke]

I have a similar problem with my FT900.  During Field Day, it stopped 
transmitting, all modes, all bands - no power out - but the Transmit LED 
lights up.  It acts as though it is Out of Band or facing a high SWR. 
Receive works fine. Could anyone suggest, is this operator error, some 
switch or feature set wrong? I don't want a schematic; just an easy 
fix!  Thanks!

Gil wb5rfq