I had a media splash ( electroPioreactor/Media at main · amy-bo/electroPioreactor · GitHub + Medan potassium acetate). Prior to realising that I must power off, I was getting green and yellow lights on the RPi but the blue LED on the HAT would not light. I have attempted to dry the boards at 37C and can now see what appears to be residue. Should I attempt to scrub off the residue (and any hidden inside the 40 pin header, etc.) with DI water and a cotton swab, then with 90% isopropyl alcohol, then dry, prior to reassembly and running self_test?
Sorry @Bingqiao a similar thing happened to me when I connected my CO2 cylinder to the gas out port, and media spurted from the sparger tube. That’s one reason I now advocate strict usage of female luer locks for inlets and male for outlets. Probably safest only pumping in/out media if the vial is in the pioreactor.
I presume you have also inspected the bottom of the HAT PCB? If it’s clear then my guess would be that cleaning the HAT would be worthwhile. Either @gerrit or @CamDavidsonPilon would be better qualified than me to advise on the cleaning procedure. I’d recommend posting this on forum.pioreactor.com too, as wet HATs must be a common issue. There much harder to come by than RPis.
As for the RPi, I’m never one to waste things, so I’d personally have a go at cleaning it too. AI will probably say it’s corroded beyond repair, but I’m hopeful that what we are seeing is dry media rather than water damage. I’d be tempted to order another RPi and HAT now anyway, to avoid delays (since drying takes a long time, particularly if you don’t have vacuum desiccant) and so you have some spares in case of future mishaps.