[Amps] KPA500 Stuck in MCU load - after failed upgrade attempt

[Jim Brown]

On 1/9/2014 8:55 PM, krishna kanakasapapathi wrote:
> Folks,
>  The KPA500 is in a remote setup and i tried to upgrade from 1.23 to 
> 1.33 over the remote setup.
>  The connection dropped and the amp did not recover.
>  The On/Off front panel does not respond. Power cycling the amp has 
> not made it go back to the
>  older version either.
>  The front panel display says "MCU Load".
>
>  I am going to call Elecraft tomorrow, but thought i will drop a note 
> to check if anyone has the magic
>  procedure to recover.

You should be asking this question on the Elecraft reflector, which 
several Elecraft engineers (including owner-engineers N6KR and WA6HHQ) 
read every day. It's rare to have to wait more than half a day for a 
useful response, and I've seen N6KR respond in a few hours to a 
DXpedition with a problem.

73, Jim K9YC