A follow-up to my previous post. It is conceivable that with some designs a suitable alternative to load resistors would be to simply remove the power tubes. That would avoid the inductive kickback problem, but would create the risk that internal voltages could rise to levels that over the long term would be unhealthy for other components, such as capacitors. So I would not use that approach without obtaining confirmation from the manufacturer that it would be ok.
Regards,
-- Al
Regards,
-- Al