Chscag, Thank you for information. Tried all what says, but still have no result. Additional info may help do see what I use, 1) MacBook Pro 7.1, Mac OS X, Ver 10.6.8, Intel Core 2 Duo; 2) MacBook Air 11 Mid 2011, Mac OS X Lion 10.7.5, Intel Core i5; 3) Rocketfish VGA adapter. When I connected LG TV to ether MacBooks my TV shows new device added and I make changes to RGB. But TV shows no signal. I disconnected VGA cable from TV and computers, but got nothing. Usually, I use PC laptop with TV via VGA without any issues, but with MacBooks nothing. With PC you should click Fn F8 to share screens, but Mac should be OK without. May be I am wrong? Sorry for long explanation.
Thx.