Good news i messaged the seller and after a brief conversation got half my money back and i get to keep the scope
Nice one
Maybe it should not be too hard to fix.
As one of the others said, sounds like the time base ramp generator. Either
1. the low voltage circuit is not generating the ramp
2. the ramp is not reaching the HV amplifier
3. the HV amplifier is not working.
In my case it was 2. the wire+connector had fallen off the pcb connector. It was near the connector but no longer plugged in. The owner had told me that the scope had been knocked over and then the screen was all blured.
Did the owner say it was working before shipping?
Since your scope was shipped, it may have been knocked. Have another look around the inside (careful not to touch the HV stuff) and see there are any wires that look like they are not plugged into anything.
Are they any components that look like they are broken or blown?
Is there anything on the back of the scope that has been knocked?