I manage to do something real dumb to my KP500 using WSJT mode.
After contacting Elecraft and describing the error codes, I received Return authorization.
I had my KPA500 for 10 years, I didn't have the original box after learning that I can order one from Elecraft (a well hidden secret among the parts list) I received the box in 3 days
I mailed the amp and on Friday and arrived in Ca. on Tuesday, Oct 20th. On November 3rd, I was informed the the amp is fixed. UPS delivered the amp on November 10, today.
The amp is back in good working order.
I received with the amp a detailed "work performed written report, including upgrades and mods.
This report contains the following information in detail:
Upgrades and mods performed
Tests performed (including a 14 hours burn-in
The report is signed by the the Elecraft technician performed the repair and test.
You can't beat that service for the price Elecraft charged.
73, Lou KE1F