Hi all, I've bought Eonon GA8201 head unit for my 2004 L322 Vogue 4.4. For testing purposes I've disconnected the BM54 and connected the Eonon GA8201.It powers up and sounds good.After testing I've disconnect GA8201 and returned to original head unit. I was surprised that the screen stoped working (no letterings) but the same time sound was OK. It looks like there is no incoming video signal. I've no idea what is wrong now? Regards, Waldemar