[Elecraft] Yamaha CM500 bias box problem

[Jorge Diez - CX6VM]

Hello,

it´s possible that the small black bias box of the Yamaha CM500 was damaged
if I use bias in the K3?

I was using DXDoubler for SO2R last weekend. CM500 connected to DXDoubler so
I needed to use the black bias box.

Since I couldn´t record M1-M4 messages in the K3 from the CM500 connected to
the DXDoubler, I connected directly CM500 (without black bias box) in the
back of the K3 and turn ON bias and record the messages.

Then I connected CM500 with bias box on the DXDoubler, but I forgot to turn
OFF bias in the K3 menu.

And I noticed that it stop working. I tested again the CM500 on the K3 and
work properly, so the problem is in the small bias box.

No signs of damage, but I cannot open it to see inside.

Any idea how to repair it or to buy another one? 

73,
Jorge
CX6VM/CW5W