[Elecraft] KSYN3A dead?

[Enrico Lorenzoni IU3AZC]

Hi everyone, today I turned on my K3 and I can't receive any signal in 
any band.
Then I tried to tune and power out is 0.0w.
My k3 has two ksyn3a, but in the menu I see DDS FRQ and VCO MD; also 
tapping DISP I see PLL1 and PLL2 (with value ranging from 2.9 to 3.1)
So it looks like the K3 doesn't recognize the two syn.
Fw rew is 5.14
Any hint? I have not opened it yet.
I have the old PLL if needed

thanks
IU3AZC Enrico