My tv is not working - LG 42LV4400 42 in. HDTV

This will mean that your TV will only accept 1 HDMI signal through that port meaning a splitter won't work unfortunately.
The only other option is to get an adaptor for another port that you do have spare on your TV, like AV or DVI.

try unplugging tv for 10 mins then try again this resets chipps in tv

nothing, compatibility issues, will never work with other tv/monitors. ask manufacturer for list of compatible products

How old are the not working t.v's? Maybe it's the plugs in the tv's, not the cable or x box's. Do other things go when you plug them in?

pls. check tv is in chaild Lock mode / LOCK mode.
so check tv panal key use . is working ? NO then tv is in chield lock mode. see user's menual and set chaild lock trun off.
chek with new remot cantrol if not work then problum is tv set
[1] see tv frant panel on IR [simbol] clear with cloth smuthly [dust free]
if not working Remot cantrol then problum is inside tv .pls check tv by nr. tech.

if cable works on other tv , it would seem that your tv just hasn,t been tuned in. go to menu, auto search and click. hope thats all it is.

I HAVE A TOSHIBA 32A33 TV AND JUST UPGRADED MY RECEIVERS AND REMOTES I CANNOT GET THE DIRECT TV UNIVERSAL REMOTE RC64 CODES THAT THEY HAVE PROVIDED TO WORK, ANY ADDITIONAL CODES ? PLEASE HELP

some zenith ha tiney slide sw on back apron. in linecord area.

pickup in tv bad.

I would get a new remote control first. Just because it is the same brand doesn't mean the same reote codes are used.