This happens totally without RF. All radio equipment is off and if I try to turn on just amplifier without RF this happens sometimes.
New observation from today:
When I get the screen like in capture2.jpg, pushing DISPLAY CMD buttons makes all leds appear in correct color FOR 3-4 seconds instead of just white, then they turn white again. So led in upper right corner turns from flashing to constant green, FULL/HALF led becomes RED (in FULL) and OPERATE/STANDBY led becomes RED (OPERATE selected). And after 3-4 seconds FULL/HALF and OPERATE/STANDBY leds turn all white but MAIN and ON leds stay RED. If I push DISPLAY CMD again this repeats..
And also frequency readout and temperature appear correct when led colors are correct, when mentioned leds turn white, frequency and temp reading turn to "--".