FPV not working - no physical damage

[jaytrizzle]

I had a slightly rough landing on grass last week about a 5 foot drop - only one of the prop guards fell off. I had the quick disconnects so there was completely no physical damage as far as I could tell. I didn't remember if FPV was still working when I turned it off but a couple of days later, the FPV would only display iOSD data, which was accurate.

Setup:

- P2 with H3-3D Gimbal
- Delvcam Dual Antenna 7" Monitor (RX)
- DJI AVL 58 TX
- DJI Hub
- GoPro Hero 3+ Black Edition
- iOSD mini

Things I tried to correct to problem were:

- Take out/put back in P2 battery
- Turn off/on P2
- Turn off/on P2 remote
- Turn off/on GoPro
- Turn off/on Delvcam
- Unscrew/screw TX antenna

The P2 is still able to compass calibrate - the lights were solid green. The next day, I tried to see if anything changed. Now the monitor doesn't even show iOSD. So the status is:

- iOSD mini blinking green
- AVL 58 TX blinking green/red simultaneously on LED and SCH LED is off.
- Delcam is black, but no snow.

A pic of the hub: https://www.dropbox.com/s/f1oflt1mbhgo0 ... 0.jpg?dl=0

It has been jerry rigged by my mechanic friend about 15 flights before this. Any help would be greatly appreciated. Thx!

 

[jaytrizzle]

anyone here?

 

[OI Photography]

I'd be willing to bet the original problem is due to a fracture in the USB ribbon cable connected to the gopro, that's a common failure point even without a crash. You should have a replacement in your H3-3D box, but if not you can get them at most DJI dealers for $4.

I'd also be willing to bet that the later problem (no video at all now) is due to that wiring job. Mind if I ask why it was done that way? It'll be very hard to troubleshoot with that, you'll probably be better off getting a new hub ($12) and connecting everything the way it should be. With the components you have I don't see any reason to have funky wiring like that.

 

[jaytrizzle]

Hey OI, I switched the ribbon cable. Didn't do a thing. Any other ideas? I might call B&H and see if they have any ideas.

 

[knuckles]

it looks like there's direct soldering on the plug and play FPV hub that looked kind of odd to me but if it was working before I don't really know. I assumed you already checked if any solder joint or anything else inside or otherwise got jarred loose