Based on your power meter readings, if it were me based on my prior experience, I would suspect that one of the PA transistors has died.? One of mine died with a direct internal short which caused the excessive power draw during receive mode. Yours doesn't seem to be pulling as much power during receive (unless your power source readout is a little off) but it could have died a different way internally.
?
I would, if it were mine, remove the display board, remove the heatsink washer, power it up (still attach a dummy load just in case), and feel if one of the 4 transistors is getting warm or hot. It shouldn't take long for a bad one to generate heat if shorted internally.?
?
And if one is getting warmer than others, again in receive mode only, replace it. Then see if you are back in business with about double the power out that you've measured.
?
But if no excessive heat is detected, I'd then remove them and test each one individually.
?
I can't say why the diagnostics screen is telling a different and inconsistent story compared to your power meter. But if there is a hardware failure, then without being an expert myself I could guess that the diagnostics could be misreporting due to that failure.
?
Stating the obvious ... you need to get that baby fixed and on the air! Fingers crossed.
?
--
73
de Roy - KI0ER
Littleton, Colorado USA