Hello Dick D Herrick,
Thanks for writing in.
We have several kinds of LM2596 items, would you please send us the produt link or ASIN number for confirmation?
And to find out solution for you, please can you tell us more details about your operation? For example, the input voltage/current, load and etc.
If you can, we sincerely hope you can take some pictures or a video to show the problem, which will be more helpful. You can send pictures or video to service#droking dot com ( please replace # with @)
With your help, we can find out solution for you as soon as possible.
Best regards.