[Elecraft] Power Supply Question

[Fred Jensen]

I power my K2/100 with a Yaesu FP-1030A that also powers the FT-847. 
Normally, it is on all the time.  When leaving for an extended period a 
week or so ago, I turned it off, forgetting that I had a 12V Gel Cell 
floating on the output.  When I got home, the voltmeter on the supply 
was at about 6V, and the supply won't turn on.

Any ideas?  I have a nearly free week and was hoping for some new ones 
with the K2.

Fred K6DGW
Auburn CA CM98lw
K2 # 4398
KX1 # 897