Good evening,
I red many posts but no one has been usefull to solve my problem.
I have a black video but with OSD.
Camera: FOXEER monster pro
FC: Iflight succex-e F405
VTX: mateksys VTX-HV
The camera works, if I connect it directly to the VTX I receive the video, but if I connect the camera to the FC I receive a black video with the OSD.
I tried all.
The cables are okay, they are all new.
I tried to connect the cables soldering them to the FC and also connecting them at the FC with the dedicated connectors.
The power supply is ok, the camera needs the battery power because it works 5-40, I tried also to power it with the FC 5V but no changes.
The video format of the camera is set on NTSC like the FC, that is the video format that my goggles have. But I also tried to use PAL format.
I added a ground from the camera to the FC.
I checked all the video options on the camera, all the options for the FC on betaflight.
I upgraded the FC to the last FW version and also to the previous one. Obviusly clearing all the settings.
I upgraded betaflight to the last 2 versions.
The battery is full, I tried also to change it.
I tried to change band, vtx power, to remove the smatport option, to remove OSD, to connect the osd camera pin to the FC pin "CC" as indicated on the FC manual.
I don't know what else to do... Do yuo have any advice?

Unless you have the camera wired up incorrectly to the FC, it's likely that there's a fault with the video input circuit in the AT7456E OSD chip on the FC. Use a magnifying glass to check for any stray solder balls, splatters of solder, or stray whiskers of wire on the FC that might be causing a short, especially between the pins on the OSD chip (it's the large rectangular chip with 28 pins).

If that all looks to be OK, can you please post some good clear photos of the wiring between the camera and the FC.

(07-Mar-2024, 01:58 AM)SnowLeopardFPV Wrote: Unless you have the camera wired up incorrectly to the FC, it's likely that there's a fault with the video input circuit in the AT7456E OSD chip on the FC. Use a magnifying glass to check for any stray solder balls, splatters of solder, or stray whiskers of wire on the FC that might be causing a short, especially between the pins on the OSD chip (it's the large rectangular chip with 28 pins).

If that all looks to be OK, can you please post some good clear photos of the wiring between the camera and the FC.

I checked the wiring diagram many times and it's correct.
The OSD chip looks great, the solders are good, there arent's pins soldered together, there aren't estraneous things on the FC, I checked all with a jewerly lens.
After soldering many times, the fc soldering pad detached and now I'm using the connector, I made some photos of the pins and of the OSD chip.
The solders on the FC are cold but I don't know why, I think that it can be because of solder and resolder many times?
I also tryed to take the power supply of the camer from the 12V out of the BEC. 
All the tries that I made didn't make any changes.
The wires are actually flying.
Now also the integrated voltage reader stopped working, the "BAT" led on the FC make a low light but the 5V and the 3.3V are good.
Thank you.

I had a similar issue with a mobula 6. Turns out the head of one of the screws that was holding the VTX board onto the FC was touching a component and shorting out the feed. That one stumped me for a LONG time.

It's not easy to see if the wiring in your photos is correct so I will just take your word for it that you've done it correctly and have double-checked everything.

The fact that you get an image when your camera is connected directly to the VTX proves that camera is actually working. Assuming that you've used a multimeter to check that you are getting voltage across the pads that the camera voltage and GND wires are connected to, then it can only mean that you must have a dead video input circuit on the OSD chip. With that, the only viable option you really have is to give up any Betaflight OSD and just wire the camera directly to the VTX. If that isn't acceptable then you will need to get yourself a new FC.

(07-Mar-2024, 02:15 PM)william_hunter Wrote: I had a similar issue with a mobula 6. Turns out the head of one of the screws that was holding the VTX board onto the FC was touching a component and shorting out the feed. That one stumped me for a LONG time.

I checked, but that's okay.
Thank you

(07-Mar-2024, 02:16 PM)SnowLeopardFPV Wrote: It's not easy to see if the wiring in your photos is correct so I will just take your word for it that you've done it correctly and have double-checked everything.

The fact that you get an image when your camera is connected directly to the VTX proves that camera is actually working. Assuming that you've used a multimeter to check that you are getting voltage across the pads that the camera voltage and GND wires are connected to, then it can only mean that you must have a dead video input circuit on the OSD chip. With that, the only viable option you really have is to give up any Betaflight OSD and just wire the camera directly to the VTX. If that isn't acceptable then you will need to get yourself a new FC.

Thank you.
Camera pins: 
VCC is connected to the + of the battery
GND is connected to the - of the battery
VID pin of the camera is connected to the VIN of the FC
OSD is connected to the CC pin on the FC, that one isactually disconnected, but when is connected it doesn't make any difference.

VTX pins:
VCC is connected to the + of the battery
GND is connected to the - of the battery
VID is connected to the VOUT of the FC
TX is connected to the T1 of the FC
I also tried to add a ground from the VTX to the FC, but no changes.

I tried to connect the cam VID to the VTX VID and them to the FC VOUT, trying to overlap the videos, but it the cam image it's mooving from left to right and it's all grey, LoL.

I really think that it can be the OSD chip that is out, like are you saying... Bad news because that FC never did a fly:/


Thank you