[Elecraft] all I wanted to do was give PSK31 a try, and now I've got real trouble

[KC9GBX at aol.com]

So I purchased a NUE-PSK modem kit ( I had them do the surface-mount  
component soldering), and after I had completed my portion of the soldering,  things 
checked out fine.
 
I also ordered the cable that connects the modem to my K2, but I was  
informed that the cable would be shipped separately.  After waiting for  nearly a 
month without receiving the cable, I decided to make my own.  I  followed the 
generic cable-wiring diagram that NUE-PSK provided in the kit  assembly manual.
 
My crash-scene investigation revealed that I had pumped 13.5 volts from the  
modem into the K2's microphone jack, pin 6, which is marked on the K2 
schematic  as a 5 volt line.
 
Now, when I push the K2's POWER ON button, I hear an initial relay click,  
but that's it!!!
No LCD display, no bar graph, no audio, no band or mode change  occurs.  
 
I'm hoping that I only fried the 5 volt regulator, U5, on the Control  Board, 
but I'm pessimistic by nature!  I didn't see or smell any  smoke.  Any ideas 
would be most appreciated!
 
It's been a great low-power rig for more than 4 years, and I'd sure like to  
save it!
 
                                                                        
Here's  hoping, and 73, Jef Fox kc9gbx
**************A Good Credit Score is 700 or Above. See yours in just 2 easy 
steps! 
(http://pr.atwola.com/promoclk/100000075x1215855013x1201028747/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID=62%26bcd=De
cemailfooterNO62)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.qth.net/pipermail/elecraft/attachments/20090120/73328c4b/attachment-0001.html