I also had a commercial grade version (different brand) sold by Costco but also returned it. 20 years ago there was a “Back-swing” device like in my link.
I had back surgery in 1981 and never have been right since. I was supposed to have back surgery #2 in 1986 but protested and went the physical therapy route, quit doing auto mechanic work, went to college, had to take a job on third shift after getting turned down about 100 times.
My biggest/worst situation that causes me problems is sitting too long and I make it worse by leaning forward to do my bench and computer work. If I am doing stressful work, I tense up and that adds to the problem big time.
What works? Sit-ups, doing leg raises while on my back and side while lying on the floor, thinking as if I don't care what the outcome of my work (very difficult to do and half my problem most of the time) like when Lil was on her pain meds recovering from her ankle surgery.
I have pain pills and muscle relaxants but rarely take them.
Limiting twisting too far also helps a lot. I have about 1 over extension or twisting too far/often, back pain a year.
The washer? Well may, just maybe a solder joint was just a bit less conductive than perfect. It could be just removing the board and wires from the washer that allowed some electrical charge to drain. I don’t profess to know the real Leck-re-alll Engineer workings of what didn’t work before and works now. Show me a full-size switch, coil of wire, or relay I can use an Ohm meter to test contacts, windings, observe the mechanical action/binding/free movements, and then I can tell you what might be right-wrong.
I have customers that have to unplug office equipment to re-set the device so it is useful. I let the washer PBC sit for half a day and it didn’t reset/gave me the same errors and codes. Once I poured a small beg of screws on a PCB so all of the legs to the ICs were touching the screws. My thought was IF some chip or capacitor retained an electrical charge, the metal screws would eventually bring the ESD or charge back to zero. But then again all I read and studied officially was a TV repair course back when color TV was new to the public. Well, I lied some. I have stacks of repair and theory books for most of the things I work on now, and stacks of auto repair, dealership training course work.
