Craftsman garage opener will not work with keypad

Yes it sounds like you got the wrong keypad for your model opener.

If your opener is Security + then both remotes must be. If it is billion code both remote units must be billion code. It sounds like you have one of each.

Yes,buy the new keypad in the safe side.Probally have new Inferred signal codes by the new remote might work with the old keypad.

The memory is limited and I think it is about 5 remotes including the keypad but there are older openers that are backwards compatible and will work with remotes with 9 position dipswitches. One model I am familiar with is the Liftmaster AD 800. You will have to call around to companies that handle Chamberlain and Liftmaster to see if they still have one. They will work with unlimited remotes as long as the switches are set exactly alike.

The remote and the keypad work through a signal sent to the receiver while the wall console, as you said it's wired directly to the opener, so it's likely that the receiver is shot. I'd try reprogramming the remote to just rule out the chance that all code wasn't erased first. (Press the learn button on the back of the operator head, stand back 5 feet and within 30 seconds slowly press the remote button a few times to see if it operates the opener). If this doesn't work, you can install an external LiftMaster universal receiver with the correct frequency and you should be good.
If there's a purple antenna hanging off the head, this is a 315 freq, use a 356LM, if black it's a 390 freq, use a 635LM receiver.
Then you'll have to reprogram your remote and keypad to the receiver.
Since there's also the issue with the light, there's also a possibility the circuit board got fried. Did you have any storms lately?

DID YOU BUY THE KEYPAD AND REMOTES WITH THE OPENER. IT SOUNDS LIKE YOU MAY HAVE THE WRONG ONES FOR YOUR OPENER.

CHECK THE FREQ. AND IS IT ROLLING CODE.

Recode keypad and remotes

Sounds like "cross talk" interfence from the other operator. You can get a plugin external reciever that should work with your current remotes. Try to get as much distance as you can between the working operator and the new reciever.

what keypad are you using with new opener? Frequency has changed. can't use old one. you probably never needed to change things; just needed to follow proper coding procedures.

Sounds like a frequency issue. A remote work like the radio in your where each station is on a different frequency. Some signal is interfering with you frequency (390Mhz) You could try another brand external receiver with new remotes or with that old of an operator you might just think about replacing the operator (don't go with "Wayne Dalton")