Can’t hook routher to my cable modem

My daughter has a laptop and it was hooked up to my computer with a lynk sys router. I had to move my computer and modem to another room Now when we try to rehook it up it doesn’t work. Called up Lynk Sys and they are all from other countried and can’t understand a word they say. Router used to have four bars of signal indicter then it had just one. Help damsell in distress.