I'm wondering if you still have the firmware patch that fixed your trigger problem. I have an SDS7102 that developed the same symptoms that you describe. I also noticed that in addition to edge not working, pulse, ext, and ext/5 are out. I can use slope and AC successfully, but wasn't able to test video for lack of an appropriate signal. I also notice that I can get a brief edge trigger when moving the trigger level across the 0v line. I think that whatever is ailing my machine is likely the same thing that happened to yours.
So far I've have tried reflashing the firmware to several older versions and then back to the latest version available for my scope ( 3.8 ). However, the same problem persists on every firmware version that I tried. I've tried contacting OWON several times but no response to chat or emails so far.
***** UPDATE:
Received two patches from OWON on 2023 2-26. The following describes my experience step by step:
1. After running the first patch (SDS7102V-EDS102CV-V5.15.0-BI) the splash screen faded and after a short time turned to solid yellow. The scope didn't reboot automatically.
2. After initiating the second patch (SDS7102V1246320) I rebooted the scope manually. The second patch hung-up on "wait for machine process". After waiting for 5 minutes I aborted the update and rebooted the scope. The scope booted to a yellow screen and kept automatically rebooting every few seconds.
3. I thought the scope was bricked, but tried running the second patch again while the constant rebooting was going on. The patch seemed to run normally this time. There were progress updates along with brief "wait for machine process" messages. The patching process ended with the "rebooting machine" message. The scope's screen was still solid yellow at this time and didn't reboot automatically. I closed the patch program and rebooted the scope manually.
4. This time the scope booted normally to Chinese language (even though I had selected English while running the patch). I changed the language to English and started testing the scope's functionality. Found that edge trigger was working properly now. The registration of the Probe Comp waveforms on the screen didn't seem normal, so I ran "self calibration" and it cleared these issues.
5. I tested all the features that had stopped working (edge trigger, Ext trigger, Pulse trigger, Autoset, Autoscale) and they are all working correctly now. I tested other common features to verify that they were not compromised. This included slope trigger, various Measures including view all, cursor measure for both time and voltage, Save waveform and settings, Help. Everything seems to be working fine.
6. The About screen now reads: SDS7102V, S/N 1251320, Version 5.15.0, Checksum E200593E.
Previously it read: SDS7102V, series: 1246320, Version: 3.8, checksum: BB9734B5.
7. Aside for the serial number and version number being different now (see 6 above), I noticed some changes in the menus:
a. Measure type has several more types available now, including FRR, FRF, FFR, FFF, ... . I haven't figured out what these are yet, they
are not described in the latest manual available for download.
b. Measure "Show All" has 3 fewer items than before: DelayA->B]~PD, DelayA->B[~ND, and Phase~RP. However, all three are still available
to add individually.
c. Utility Function Output has three more items than before: Connect Computer, Connect Printer, and Print. When I press Connect Computer
or Connect Printer I can hear my PC's USB connect sound. Print is shaded, I presume it needs a printer connected to become available,
but I haven't figured out how to do that yet. These new menu items are not documented in the latest manual available for download.