I have posted pics on ES Boss thread showing what I think is a fried component possibly a nano solid state looking resistor. Hoping Aulakiria the designer will see it to confirm.
https://endless-sphere.com/forums/viewtopic.php?f=14&t=89076&start=375
The component is on D1 line on the rear of the lcd display, as the display no longer switches on my thinking is D1 = display line.
I'm not binning it as I think it is repairable but at what cost ? That is the problem with small techy units.
The Malectric is likely better like the Kweld separate component parts are available and in Germany so easier then Korea.