How to repair water damage insta360 x3

I had disassemble the x3. Clean the motherboard up with electrical contact cleaner, IPA. It switches on but just a red light. Scree.n comes out but just illuminated black. Please help

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0