"Reset hard or soft?"에 답변That's a blast from the past! I cut my teeth on an Apple //e so maybe I can provide some insight. Typically on startup, the Apple 2 series would display a bunch of junk on the screen and then clear it, with Apple ][ or Apple //e at the top of the screen. It would then boot Dos 3,.3 or ProDOS from whatever floppy drive you had. IIRC, the transition between screen garbage and the black Apple .//e screen happened when the system loaded and ran the system ROM. So my guess is that there is something wrong with the ROM. You are probably right about moisture. It may be possible to repair. I would take a look at references from KansasFest. It is meeting of Apple II enthusiasts that discusses stuff like restoring and repairing old Apple II systems, among other things. For example: https://www.youtube.com/watch?v=MFfjdIWe... "So You Want To Repair Your Apple II — Jay Graham — KansasFest 2017" You may be able to connect with some of these folks. Jay Graham appears to be The Man when it comes to repairing/restoring...
"heater to spa pack hook up"에 답변EDIT: Updated with new information about where to attach wires Standard warning: before hooking anything up, make sure the power to the spa is off. Preferably flip the circuit breaker for the circuit supplying the spa. Your spa may plug in, in which case, pulling the plug is also OK. Do not ever work on the spa without the power turned off. The household current can kill you. I don’t know how much you already know , so I’m going to assume you have no background at all. I apologize in advance if I’m going too basic, I’m not trying to mansplain I’m just trying to answer the question without making assumptions. With that out of the way, here is what your wire colors mean. The brown wire is the hot wire. In household 110V AC wiring, it is the black wire. The blue wire is the neutral wire, the same as the white wire in household 110V AC. And the green/yellow wire is the ground wire. It is the same as the green or bare wire in household 110V AC. Here are some videos on how to connect wire to screw terminals....
"Micro USB port detached from circuitboard (PCB), about putting it back"에 답변It's likely this issue is ancient history for you, but I should make a note that there may be a way to re-connect without solder. If you have exposed copper from the traces you can use highly conductive paint. I've used silverprint paint (example: https://www.amazon.com/MG-Chemicals-Silver-Conductive-Container/dp/B005T8XACI) to draw new traces and bridge small gaps.. I've fixed a few component removal misadventures this way. How well you do depends on your skills with a very fine brush. The stuff is expensive because it conducts via silver particles., which is also why it works so well. EDIT:removed typos