LG Dishwasher beeping and flashing

About six months ago, our LG washer (LDFN4542S.ASSELAT) started making a single beep with about 30 minutes left in the cycle. It would finish and clean fine, but we were concerned. Research here suggested it was the latch, so we just ensured it was always closed tight. Recently it has started behaving more strangely.

It has stopped in the middle of the cycle and just shut off. When I opened the door it started beeping at me (https://photos.app.goo.gl/jLyNGT4pXrzqUQUA9).

On a few occasions it just starts flashing and making a ticking sound. Sometimes it continues and sometimes it just stops ticking and continues the cycle (https://photos.app.goo.gl/Bwif52uuFFUGuzcWA)

We tried turning the power off, waiting more than 5 minutes, and turning back on. We maintain it regularly, including cleaning the filter and running cleaning cycles.

At this point I am pretty sure it's not the latch, but research suggests the control board.

Any thoughts or suggestions? Neither of us are handy with repairs, so if it can be fixed it would be through a service center