Both units have been tested with a bench power supply, and both turn on without issue. One of the units states that the "pair" needs to be repaired; this same unit also didn't have all the lights illuminate during testing of button and knobs. The second unit didn't appear to have any issues with lighting when changing settings using the button and knobs. Both have a moderate amount of wear due to age and usage. Neither have any major cosmetic damages. No accessories are included.