This Repair Kit is directed to people with basic knowledge in electronics.

M-tronicz TV Repair is offering this repair kit for a common failure in  41A5021-1B  Control Boards:

Dead

Clicking

Remote not working

Door will not go up or down

No light on garage door wall button

Erratic flashing light

                                                                                             1.  Garage Door Opens from Wall but not Remote

2. The remotes could be programmed - intermittently.  
                                                                                      3. Remote could 'communicate' with the opener - the little LED on the back of the door unit would blink when push the opener buttons.
4. Garage remote could open the door, but not close it.
5. No LED / CFB's
6. Motor making a partial revolution after repeated activation from button or remote.

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Because not all of the boards fail in the same way, we do not guarantee that the components in this kit
 is all you need to fix your board but it can take care  90% off all cases. 
It's your responsibility to troubleshoot and properly diagnose your board in order to complete the repair.

We recommend all kits fitted by a qualified personnel. 
A successful repair depends on the own skill and fault finding ability.

This service kit is intended for use by persons having electrical, electronic 
and mechanical experience and knowledge at level generally considered 
acceptable in the consumer electronics and appliance repair trade.