1) For the first 4 months, whenever I turned the scope off it automatically saved all settings. Yesterday, it stopped doing that and reboots as almost a new scope would with only channel 1 active and in the center of the screen. All vertical settings and horizontal settings from the previous session are lost. I searched on the Internet and couldn't find a solution. Also tried a "save" but that didn't help.
2) This problem resolved, but was bizarre. In the "coarse" settings mode for vertical sensitivity, the sequence for all channels was 1,2,5,10 V. Three days ago, that sequence changed for channel one only and was 1,2,4,10 V. Of course using the fine control I could set the voltage to 5 V. After a few reboots over 2 days, this problem disappeared, but then the problem described in #1 started. That behavior made me wonder whether they might be related, such as a problem in flash memory.
Thank you. John