Boscam RX-LCD5802 no video on Diversity mode

[bishafr]

Have a Boscam LCD5802 and was working fine. For some reason it stopped receiving video on Diversity Mode (i get a black screen). On both Channel A and B i receive Video.
I don't get the White Static signal on Diversity, just Black screen.

Anybody has experienced this ? any idea how to fix ?

 

[JKDSensei]

Could be a power supply issue. How old is it?
The diversity circuitry requires more power than single antenna mode.