Hey everyone, this is my first post, and I'm just getting used to the forum. I recently bought a second hand FPV drone, and am having a blast with it, until the other day. I was flying my quad, all was going well, and suddenly I lost video all reception, even though the drone was only about 20 metres away from me. I crash landed, retrieved my drone, and everything appeared to be in working order. I thought perhaps my VTX antenna was loose, and that caused the VTX to short out, so I replaced it (luckily my quad came with spare parts). Turned the quad back on, and still didn't work. No signal on all channels, and I have no clue what to do. I'd really appreciate it if someone could lend a helping hand.
Thanks!

Do you know why vtx you have on the quad? Does the vtx have any status lights?

Without an antenna connected a vtx can damage its self within a few minutes. Some vtx’s have protection mechanisms to prevent extensive damage but its always recommended to avoid such a situation.

(11-Sep-2021, 01:13 PM)kafie1980 Wrote: Do you know why vtx you have on the quad? Does the vtx have any status lights?

Without an antenna connected a vtx can damage its self within a few minutes. Some vtx’s have protection mechanisms to prevent extensive damage but its always recommended to avoid such a situation.

Hey Kafie, 
The VTX I have on the quad is a TS5823 32CH 200mW VTX. I always have an antenna installed so that the VTX doesn't burn itself out, but I have no clue why this is happpening.

Is the VTX powered up? Do the led’s light up?

Components in this hobby are not built to last and often they just stop working.

Having antennas is a precaution but a vtx can still burn up if left powered on without active cooling.

(11-Sep-2021, 03:05 PM)kafie1980 Wrote: Is the VTX powered up? Do the led’s light up?

Components in this hobby are not built to last and often they just stop working.

Having antennas is a precaution but a vtx can still burn up if left powered on without active cooling.

The VTX does not light up when I plug in a battery, and it does have led's on it. 
Do you think the vtx is not getting power?

If you have a multimeter then it best to check that the pads suppling voltage to the vtx.

If the FC is providing powering to the vtx then the vtx is probably dead. Also check the wiring at the vtx end while you are at it.

(12-Sep-2021, 04:49 AM)kafie1980 Wrote: If you have a multimeter then it best to check that the pads suppling voltage to the vtx.

If the FC is providing powering to the vtx then the vtx is probably dead. Also check the wiring at the vtx end while you are at it.

Okay thanks Kafie, you've been incredibly helpful

If it is dead at least that is a cheap vTx, and it looks like it connects with a plug. That way you can replace it with the same one without having to do any soldering.

https://www.akktek.com/akk-ts5823.html

Just unplug the old one, take it out, install new one, and plug it in.

As Kafie said if you are getting voltage going from the flight controller to the vTx but it isn't working then it is probably a dead vtx. If that is the case then that would be the cheapest and easiest fix, especially as it connect with a plug instead of solder.