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It's hard to say, maybe there is no problem now, but water and dirt will definitely corrode later after they get in.
Leave it to dry in a ventilated place and be careful not to let it out in the sun! Be sure to dry it thoroughly without a little moisture to prevent it from burning out!
Put it for two days, if you go to the after-sales service to clean it up during the warranty period, it will be no problem to turn it on.
Check some for enteritis first, which is most likely.
Your water pipes run under the floor, right? The water pipe is leaking, get a plumber to check it as soon as possible, otherwise, the floor is useless.
The USB connection port may be damaged, it is recommended to disassemble the device and dry it with a blow dryer, or wipe the USB gold finger with a cotton swab!