If you used SDS7102UP3.4:
SDS7102UP3.4
!! NOTE !! The firmware NOT applicable to SDS7102E.
The firmware applied to the products with following production batch / serial no. -
SDS71021312xxx, SDS71021319xxx, SDS71021327xxx, SDS71021334xxx, SDS71021344xxx, SDS71021352xxx,
Change log - :
1. XY mode - persistence function added ;
2. waveform refresh rate improved ;
3.waveform cutting/ recalling function added;
4. autoset - waveform recognition;
5. channel invert bug fixed;
6. probe attenuation compensation;
7. recorded waveform exported to USB drive
8. automatic measurement - 4 more options available
9. vertical position over-speed movement bug fixed
I think you should have used:
SDS7102UP3.3 !! NOTE !! The firmware NOT applicable to SDS7102E.
Only applied for batch and serial no.-
SDS71021211xxx, SDS71021219xxx, SDS71021223xxx, SDS71021234xxx
SDS71021240xxx, SDS71021246xxx, SDS71021251xxx, SDS71021303xxx
Upgrade detail :
1. Fix waveform math function
Because you serial is in the red range.
It's just a guess!
Edit: Yes, the .PDF inside
http://files.owon.com.cn/software/upgrade/sds_upgrade_3.2_3.3_3.4.rar indicates it can be used for the SDS7102 1211xxx.
Well, I would flash it again... and see if this time it works.