Purchased a second-hand DS2072, firmware 3.3.sp2, there is a strange error message when pressing the AUTO button ().
OPTION is empty, update to FW3.6, the problem is still the same,
start to restore firmware 3.5 3.4 3.3 3.0 2.1 1.03 can not solve it.
FW 0.1.0.5 OPTION shows that all trial expired, the function of AUTO button is restored.
Directly update FW3.6 +OPTION DSHH function is fully open and the AUTO button functions normally.
Unexplainable phenomenon