[Elecraft] [KX3][XPA100] KX3 drops out of PA MODE ON

[Glen Torr]

Hi list participants,
I have a KX3 and a KXPA100 that till now have worked fine. Last night I
turned on the combo and set "PA MODE" to ON. The amp came on, it displayed
in sequence the ON, ANT1, MAN which went out to be replaced by AUTO.
About 7 seconds later the KX3 returned to "PA MODE OFF" and the amplifier
turned off.
The KX3 reset its output power to 5 W.
I have downloaded latest beta firmware for both but the problem remains.
There is an uncharged set of eneloop AA NiMh in the KX3.
I feel I have made a dumb mistake somewhere!
Any ideas?
I have searched to no avail.
Cheers,
Glen VK1FB