KVM switches are nice.... when they work. Unfortunatly I havent found a single brand that will last more then a little while with the longest lasting about a year.
In short your KVM has bitten the dust. Gone bad. Broken! Will likely never work again.

Hello John. Call your cable company directly. They have a vested interest in assisting you. Plus while you are on the phone with them have them check your signal. Your loss of channels may be their doing. Regards, Joe

Shouldn't you be getting these passwords automatically if you paid for the channels?