Well I bought my scope from Amazon, UK, from a company that purports to import them to the UK. So I paid 100 pounds extra compared to ebay, but at least I thought I was buying from the UK, so avoid all hassle with customs etc.
The scope took many weeks to arrive, so obviously it came straight from China. Additionally now that it is broken, I have been exchanging emails with the UK company, who appear to be signing their emails with a US new jersey address, and they have been asking me dozens of questions like "did you earth the probes?" "did you try both channels" "did you try alternative probes" and all that cr*p. My first email to them I believe was December 28, and as yet I have not received solid instructions on how they propose to repair it or replace it.
Crossing fingers they will honour their 3 year warranty.
Please do you have 1 pcs 50ohm bnc terminators?
If you have:
Default scope.
Set oscilloscope menu probe setting to 1x for both channel.
Turn both channels to 5mV/div
1ms/div speed.
Turn memory to 1M
Turn acquire to Peak mode!
In all cases keep both traces visible.
1.
Connect one BNC terminator to ONLY CH1 but so that its center pin do not make contact (you pull and push you look trace you find where it connect and where not.
Take TFT image to usb or computer.
Push terminator fully in (it make connect) and take image agen.
(in both images keep CH2 just open)
2.
Connect one BNC terminator to ONLY CH2 but so that its center pin do not make contact (you pull and push you look trace you find where it connect and where not.
Take TFT image to usb or computer.
Push terminator fully in (it make connect) and take image agen.
(in both images keep CH1 just open)
Show these 4 images.
If I try help you for arrange RMA with Owon I need know real data what show to me that it is broken. It seems that your seller is just in class "we sell nice boxes but we do not know what they are"
Opinion is not enough in this case - it need data. (I do not want burn my fingers with Owon (becouse I need use "kitchen door" for help others than my customers) if later there find that reason for noise is example some (very bad and strange) electromagnetic noise in your enviroment. I do not try tell that it is my suspect - only I want close this small posibility out first)