[Elecraft] Cal tPA trouble

[Les Preston]

Hi there,

I have just got around to building my KPA100 (to Appendix G - Rev. C-5) for 
my K2 (53 * * ), and thought that you may be interested in hearing about one 
problem which I encountered during the build.  When I went to CAL tPA, I 
found that the temperature reading was 'stuck' on 0 degrees C and wouldn't 
move for love nor money!  Anyway, I checked the circuit through and was 
convinced that I had a corrupted U1 Microcontroller, and was just about to 
call it a day and order a replacement when, with a frantic to and fro on the 
tuning dial, the digits suddenly re-appeared!!  CAL tPA was then carried 
out!  I just wondered if anyone else had come across this and what is/was 
the cure?, as I don't recall seeing anything in the archives, except for a 
similar problem, but being 'stuck' on the number 255.

73,
Les  M0BSI