DSO2D15 DC input offset

kss

I bought a dso4254c oscilloscope with exactly the same problem. Correspondence with the service from the official Hantek store gave nothing. Contacting the service on the Hantek website also did not give anything, they simply do not respond, although the website says about support 24 hours a day. Hantek are just scammers, they sell low-quality appliances and do not provide any support. If you want a good instrument, buy from Keysight, Tektronix, Le Croy, Rohde & Schwarz. And Hantek sells consumer goods, not serious equipment and deceives its customers.

kss

I have already heard enough of these tips from "specialists" from Huntek. I warmed the oscilloscope for several hours !!!!!!!!! and then performed calibration. This does not help the offset remains. In the photo, you can see the situation after warming up for several hours and calibration. I've already sent a lot of files, do I have to send them out now for half my life, or does Huntek finally recognize the problem of selling faulty devices and start helping his customers?