Hello guys,

I have a pair of EV800D that were not picking up signal so well. Troubleshooting the issue, I found out that my source A (left antenna) does not pick up any signal. This is true also when used without antennas very close to an active TX, source B gets video, while source A gets static only. Further confirmation comes from the left LED, solid green when source B is selected (and I get video), solid red when source A is selected (and I get only static).

I tried taking the goggles apart revealing the board, there seems no evident issue. While switching it on and off, I was able to pick up a signal on source A, only to lose it after turning it off and on again. So the issue seems to be hardware related, and affected by my fiddling around.

Can you help me troubleshoot more clearly? Is there any hope to fix this chaeply?

Right now I'm forced to mount an omni antenna on source B, and basically can't benefit at all from diversity.
I'm using band R and channel 8, if that makes any difference.

Thanks in advance.

EDIT:
So I figured out the problem. When I turn on the EV800D, the receiver module on source A boots up on a seemigly random frequency. I'm able to select different ones, but it will stay locked on the initial one. I verified this by changing the VTX frequency by tial and error, until I get a video. I will get a video even if the goggles say I'm on a very different frequency, I suspect the band/channel switching for source A is gone.
Very annoying it will boot up every time on a different frequency, so I can't match the VTX once and for all.

Attached an example: https://imgur.com/a/zJZIYFJ
I boot up, no signal. Switch around the VTX until I find out that source A is picking up E2 (5685). Notice how the goggle is set to R3 or R8 in the meantime.
Turn on and off. Signal is lost until I find out that source A is now picking up B1 (5733). Band and channel in the goggles still don't affect reception.

Updated with an edit.

Does anyone know how to restore the band/channel switching on receiver A? Maybe it's just a solder to redo, I don't wanna give up on these fantastic goggles yet!

You probably have defective set of googles. The RF receiver modules on source A seems to be the one that bad in particular.

If you are unable to return the goggles for a replacement then your best bet is either fly them on the single receiver B or get an external module and solder wires in to receive external video:

Dead thread revival but I just had the same issue and found a fix. Hopefully this will help someone from some stress.

The goggle can be set to diversity, source A, Source B and AV.
Hit the SRC button until you see ‘Diversity’ in the top left corner.