[Elecraft] Low power with K2/100

[Peter]

Hi

After a few years of good service,I  have a problem with the K2 output.
I  have the K2 with K2/100.

The barefoot K2 put full power out on all bands via the bnc connector
When I connect the K2/100 with PA off with the menu there will be low 
power on the ant connector on the higher bands (15/12/10 meter).
Since 10/12/15 are combined, I suspect the bandpass filter

I tested from TP2 and ANT. out and see NO interruption  when change to 
an other band.
All C's, L's  and solders look good.

So I guess there will a bad relais thats stay ON when I go to 10/12/15M

The relais in the BPF  are  N.O. when not selected, right?
If so, I can measure between de N.O. and COMMON to see if the connection 
goes away

Futher more, there is 12V at U2 (pin 14 18,17,16,15,14) when the relais 
in NOT selected. If selected the needs pin good down to 0V, right?

Any other thing to look at?

Peter
PC2A