I thought I already posted my first repair. Guess not.
The ribbon cable that connects the display to the motherboard failed abruptly a few nights ago. I had replaced this part around October. Turns out cheap Chinese parts don't last long.
Well I need a phone and couldn't wait a week for replacement parts, so I bought a new phone that night.
Now that there's no rush, I'm going to order the replacement part and fix this again.
In the photo below, the ribbon cable that plugs into the board in the left has failed. The connector was actually getting was because it's making a bad connection.
I'll update when the part arrives.