hi there
you didnt mention if the remote worked ok when the tv was actually switch on normally.
if not it could be a number of things within the remote it's self
old batteries , bad connections , broken ir led
or the faviorate if its been dropped is the yellow or blue
xtal ceramic resonator has become disconnected
if so simple get a new new one and solder it in .
all the above answers though are only revelant if the remote
does not work when the tv is switched on normally ..
cheers paul
happy snapper, September 2006