The Hold light was stopped coming on for all of the stations, how do I reactivate it?

I can see your a man of few words, but a little more description will be necessary. Are you referring to the message waiting light not coming on when a message is left? Also knowing what phone system and voicemail you have would be helpful.
mark

I would guess from the post that the hold light is not coming on when you place a caller on hold?
More information would certainly be useful... What system? What kinds of phones? Etc...

System is Executech 2000 E60PT and phones are 6600 LED type.