1.give this jack to another loud speaker in put and make sure the sound is coming 2.if the sound was present., just conct this jack back to the tv and change rhe tv input seting mode to auxilary mode (in tv mode selection) ,sound will come.

1.Make sure ur monitor power supply is working well a.check the power plug out put where ur monitor is conected b.check the inlet power of power pack (cable out) c.check the in let power of monitor ic conected properly 2.Make sure the vi deo input sourse is on 3.Make sure the video input is conected in proper jack 4.Check the video setting in the monitor 5.Keep monitor power ON and try the various video modes in tke monitor setting..,like s - video.,rbg ..etc., 6.if ur monitor power and video input are fine , but still the video is not coming with all video modes eaven after (keep the monitor brightness hig),then Monitor need to be opened and checked by an electronics tech./engineer.