Aventon Pace 500.1 - What I learned when I tried to repair/replace the LCD display

In the unlikely event that anyone finds themselves in a similar situation, I'm writing this to hopefully save you some time and annoyance.

I have a Pace 500, first generation. It has an M5 display with a 5-pin connector. Recently, the cover/frame of the display popped off on one corner, exposing the LCD undernearth, and the LCD panel started bulging out from its housing.

I initially tried to super-glue it back on, but that didn't work (don't do that). So then I looked into purchasing a replacement. Aventon only sells a newer display that comes to over $80 with shipping, so then I thought could get one off Aliexpress for like $20.

I naively thought another display with a 5-pin connector would work (like a computer monitor connecting to a computer), but that turned out to be incorrect--the display connected the bike powered on, but it gave an error message, because it turns out the controller and display need to be able to talk to each other with a specific protocol.

The standard protocol these days appears to be UART-2, but Pace 500.1 is apparently a model-specific protocol of UART-1, which I could not find for sale anywhere else, and is evidently UART-2 displays are NOT backwards-compatible.

Turned out the easiest thing was: Just take it to a cell phone repair shop! I found an independent place and they said it might only cost around $20 to reseat the LCD in the housing and reseal the cover/frame over it. I came back 20 minutes later, and they gave it back to me fixed and said "no charge."