I have posted video below - trying to fix a friend's quad and no matter what I do I get video like this.  I've tried swapping cameras, swapping VTX's, powering the VTX's off the FC and directly from battery power - no idea what could be wrong now.  Any help is appreciated.  Thanks!


Video

Try and connect the camera directly to the VTX.

Since you have swapped camera and vtx's and power sources there seems to be only one thing in common, the FC.

It maybe the OSD chip on the FC causing the video standard to mess up. You might want to also ensure you select the correct standard PAL or NTSC for your camera in the Betaflight OSD tab.

Also reduce the power of the VTX and check.

Thank you kafie! I had also tried reducing the VTX power as well as switching between NTSC and PAL. However, I wired the camera directly to the VTX and it works fine now.

Fortunately I have an identical board with a dead MCU and a couple of other issues, so I will replace the OSD chip tomorrow and see how that works out.

Thank you again!!!

Just a small bump to say thanks again - the OSD chip replacement worked like a charm!

Happy flying

Well that was too good to be true...Now the video won't come on and I get a black screen. It was perfect for the first time I plugged in. Now I plugged in again and got perfect video for a few seconds before it went to black, and now I can't get any feed to come on at all. I'm wondering if the board itself has a problem now. Both 3.3v regulators show 3.3v...and I would think I'd get SOME video even if the OSD chip was bad. I tested another VTX and same problem.

If the rest of the FC is working then probably the replacement OSD chip has given up.

Perhaps its an indication something was wrong with the FC elsewhere which caused the first OSD chip to flicker.

That's what I was wondering. I'm gonna tell my friend to just get a new FC - this isn't worth the trouble anymore. Or I'll just wire the cam directly to VTX and show him how to set up voltage callouts on his transmitter. Thanks for your help, though!

a cam with osd provide accurate voltage data and even warn befor low voltage

Oh, dang! I didn't realize there are cameras with OSD built in! Thanks!

You can also get an external OSD board and connect a UART from the FC, enable MSP and get all the OSD telemetry.

Something like MinimOSD.

But if you are bashing and crashing then Camera OSD for voltage should be good enough as Hug's suggested.