Amiga Test Kit 1.20 (Released July 18th, 2022) by Keir Fraser is an excellent tool for diagnossing issues with memory, keyboard, floppy drive, controller ports, audio, video, CIA Chipset, RTC and serial / parallel ports.  Highly recommended!   Comes with an ADF image and CLI utilities.

This program was perfect for diagnosing a sound issue in my Amiga 4000.  I highly recommend this excellent utility!