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Tello Repair

S1L3NT_

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During the recent floods near my area, I flew my Dji Tello drone and realized the calm winds had suddenly gusted and disconnected the drone from my phone and crashed into some power lines and soon into the floods. 5 hours later I rescued the drone and saw minimal damage to the drone and some corrosion that I cleaned up. And I also soaked the drone in some isopropyl alcohol to remove any dirt and gunk from the chips and solder pads and to loosen up the corrosion I saw. 2 days later after verifying that the drone is dry the drone turned on and started posting and the drone was ready for connectivity in which I tried to connect but the drone wasn’t broadcasting its WiFi signal. I thought I might have snipped a wire or might have damaged the WiFi chip onboard (I don’t know where it is please let me know) but the drone still turns on but can’t connect to my device I also removed a small chip near the camera disconnect since it was covered in the hot glue. I have no idea what significance that offers? Any ideas that I could fix the drone. Photos attached below with numbering.
 

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quaddamage

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If you removed a component, make sure you solder it back on.
Looking at O-Gs wiki, the chip responsible for wifi is Marvell 88W8801. Check its datasheet and make sure it is powered.

Components covered with silicone (I don't think there's any hot glue) are covered either to dampen vibrations, or to avoid power failure due to moisture. Meaning they're typically either electromechanical devices (like IMU) or power delivery.

From your photos, the "H6C" component looks suspicious. Make sure to verify it.
 

S1L3NT_

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If you removed a component, make sure you solder it back on.
Looking at O-Gs wiki, the chip responsible for wifi is Marvell 88W8801. Check its datasheet and make sure it is powered.

Components covered with silicone (I don't think there's any hot glue) are covered either to dampen vibrations, or to avoid power failure due to moisture. Meaning they're typically either electromechanical devices (like IMU) or power delivery.

From your photos, the "H6C" component looks suspicious. Make sure to verify it.
In which photo?
 

quaddamage

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I've seen boards with components which were there only to look pretty. But these are exceptions, utilized only in very specific products, which either pretend to be something else or are directed to people with issues.

Normally, if there is a component on the board, it does something. Because each component costs. If the cost could be avoided, I can assure you the component wouldn't be there.
(and realization that this isn't obvious for everyone made me believe in humanity a little less)
 

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