I bought this amazing little machine a few months ago and it has worked prefect…until today :/
Accidentally i connected 12v power (i have several DC adapters with the same plug and one of then has 12V output).
The display started to flash and in matter of seconds i powered it down. I pluged in the correct adapter (5V), but the OSSC is totally dead.
I opened it to check if there was any obvious faulty and I saw a suspicious area:
EDIT: Just forgot -> you should check first if the F1 fuse isn’t blown…
C93 & C31 are both 10µF capacitors. C93 could be broken. But afaik they seem to work as decoupling capacitors – so even if one of them (or both) are broken you should still see the unit powering up. It’s more likely the U5 regulator you’ve fried, since it’s rated for a maximum input voltage of around 6-6.5V… so you should measure if only the middle and the heatsink pin are connected to ground and if it outputs 3.3V.
U5 is a bit tricky to desolder (since the display is nearby) but it is an inexpensive part to replace: