Phantom 3 4k wifi board possible damage. Need help

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Hi
A stupid piloting error resulted in my phantom 3 4k crashing into a tree and landed in water. The battery fell off before the craft hit the water. I fished it out dismantled the craft completely and dried it out for 3 days (sun, air, rice). Got a new battery and reassembled the quad. The camera and gimbal seemed to be working.

Got a message that i needed firmware updation. Initiated that, but the quad disconneced after 5 miniutes. Rebooted, the app initialised without problem, firmware status read latest, a minute after i got the ready to fly message, the quad disconnected from wifi - no telemetry, no video feed. The app connects to the remote, but not the quad.
This has been happening ever since. I am able to control the quad , but the connection to the app disconnects after 5 minutes or so. The only visible damage from the crash is a small dent on the VPS sensor.

There was red liquid traces on the wifi module after the crash indicating water damage (all the lithmus stickers had gone red) .
Was hoping someone could help me with this issue. Are there chances of the antennas getting damaged in a water landing? My guess is that it could be the wifi board or the antennas. Any guidance would help.
 

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