Hi Matt. The issue still really sounds like a loose connection somewhere. Maybe since you are sure your soldering is OK you could try giving a gentle twist to the tabs on the back side of the LCD module to tighten them up. The one that you had to bend per the instructions may need a tightening twist to it as well. Connections inside between the LCD unit and the backplane circuit are just contacts that need to stay reasonably tight. In the unlikely event that it's something glitching in the firmware, then a factory reset might fix it. If you don't have meaningful intelligence on the screen long enough to get through that process you could always do it by counting button pushes and rotary encoder clicks. I actually wrote down the "blind" procedure to do a reset. If you need that, let me know. Good luck ..73 ... Ron
New QCX Mini (20m) build and everything seems to be working except for the screen will go blank and/or display a mix of /'s and ?'s after the initial boot screen. Boot screen always displays both lines of text and then roughly half the time I get the random mix of ?//? on just the top line or a single black character on the top right. The other half of the time the screen displays the frequency on the top line and I'll get a few button presses before it again falls back to the ?/???? junk. Pushing any of the buttons updates the line but never goes back to anything other than a single black box or the junk characters.
?
I've inspected the board pretty closely, re soldered pretty much everything on the board at this point, and checked continuity between the screen and IC2 pins which all seems to check out. I've also checked the voltage on all the screen pins with a multimeter and while they aren't exactly what is in the build guide they seem to be within the expected operating range. That about hits the limit of what I know to do for troubleshooting, any advice would be more than welcome.
Ronald Taylor