I have an older Hantek 6022BE. On your website I could only find information on the 6022BL.
Everything looks similar but the BE does not have an on/off switch.
I could not find any reference to the Red LED right above the input to CH1 which is blinking about 1/sec.
It failed the calibration check and does not pass the functional check either.
I haven't used it in a few years.