Why no live image on DJI Goggles?

Hello everyone

I crashed with my FPV drone (Protek 25) due to lack of reception.
I was able to find the drone again, and after tightening a few screws and cleaning it, the drone itself is working again. However, when I turn on all three components as usual, I no longer get a picture on the goggles; only a black background with the DJI logo. Since the goggles can't be broken, it must be the drone.
By the way, I can see in the bottom left of the OSD that the controller and the drone are connected. Theoretically, I could fly, but without a picture.
Do I just need to buy a new antenna, or what could be the problem? The front camera doesn't look broken or anything from the outside, but I don't know if the electronics were damaged in the big fall.