Cant get 2 remotes for garage door openers working at same time

TC . links to trouble shoot remote and replacements.
to show your appreciation press the helpful button and follow me on fixya for more tips and info.
How to Program Craftsman Garage Door Opener Remote

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjK6ru8s_rKAhUimoMKHasTAtYQtwIIGzAA&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DIU80hOcnNQo&usg=AFQjCNFXh3W7zMAccKCNvoFsR-AsU5cm6w

craftsman garage door opener remote not working

How to Fix Garage Door Opener Remote That Has Stopped Working
Troubleshooting Garage Door Opener Remote Problems Sears PartsDirect

About 496,000 results (0.43 seconds) Search Results

[PDF]GARAGE DOOR OPENER Model 3265 1/2 HP ... - LiftMaster

www.liftmaster.com/.../en.../tucmanuals/114a3044.pdf Chamberlain GroupFasten the manual near the garage door after installation. .... This garage door openerhas been designed and tested to offer safe service provided it is installed, ...

Manuals Download Craftsman Garage Door Opener Model ...

www.craftsman.com/search=manuals%20download%20crafts...

CraftsmanCraftsman has the best selection of Garage Door Openers in stock. Get the Garage Door Openers you want from the brands you love today at Craftsman.

Craftsman 1/2 HP Chain Drive Garage Door Opener - Sears

www.craftsman.com > ... > Garage Door Openers

Craftsman1/2 hp Chain Drive Garage Door Opener Opens by Remote, Inside and from Car Enjoy a great end to every day by ... Owners manual - English (Warranty).

Free Craftsman Garage Door Opener User Manuals ...

Stacy, get a ladder and climb up to the opener. The directions are there, but typically you press a button for x seconds, and then press a button on the remote. This handshakes the two units. continue for other remotes.

You need a new remote.

If you have more than one remote and they all work but when you try to program the keypad it causes the remotes to quit working then your keypad is bad.

If you are absolutely sure you got the correct remotes for your opener then you have a bad logic board.

I am assuming that you want to know how to program your garage opener with a remote control? In that case, open up the garage opener box (its mounted on the roof). You will see a colored button in there somewhere and above it is a small light. That button is called a "learn button." Push the button and hold a button on your remote that you want to program it with and the "learn" button should flash a few times. After it starts to flash, you can release the remote and it should be programed.

You have a remote that has reverted to an earlier technology. The only way out of this is to purchase the same exact model number called for by your opener and go through the programming. You will find the new one will work with one of the old ones. Remove the battery from the one that isn't and drop it in the garbage.

Try this link
http://www.garagedooropeners.us/helpgifs/chamberlain_troubleshooting.html

most of the time when the lights start flashing on them and they won't work it's something in the way of the eyes that cross the garage at the bottom are something bummed them and there not lining up no more check that first.