I have a lift Master Model 2280 garage door opener. At times it works perfect other times it will stop going up or down. Sometimes while it is not being used the lights will go off and then come back on of their own accord. If I tap or push on the rear of the unit(where the board is located) I can cause the lights to flash on and off or off and on. Any suggestions?

On the rear of the motor unit you will find the 'up force' adjustment. Increase this about 1/4 turn and try. It is also a good time to remove the cover from the motor unit and check the drive gear. It is a white nylon gear just in front of the motor and it will be obvious if it is going bad. A bad RPM sensor will cause the door to stop when the door is opening and reverse to the open position when closing.

Check your door sensors.

If the main light is blinking 10 times check your door sensors. Make sure they are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have a bad sensor.

ANY TIME YOU CHANGE THE BATTERY IN A REMOTE IT NEEDS TO BE REPROGRAMED.

ON THE CIRCUIT BOARD YOU WILL FINS A SQUARE BUTTON.
PRESS AND RELEASE NOW HOLD DOWN THE BUTTON ON THE REMOTE FOR ABOUT 20 SECONDS. WHEN YOU PRESS THE REMOTE THE NEXT TIME THE DOOR SHOULD OPEN.

SOUND LIKE A BROKEN SPRING.
LOOK ABOVE THE DOOR IF THERE IS A GAP IN THE SPRING IT NEEDS TO BE REPLACED,
I DO NOT RECOMEND THIS AS A DIY JOB. THEY ARE UNDER MUCH TENSION AND CAN COST YOU FINGERS IF YOU DON'T KNOW WHATYOU ARE DOING - CALL A PRO

HOPE THIS HELPS

Check your door springs to make sure one hasn't broken. Then remove the cover off the motor unit and check the drive gear. It is a white nylon gear just in front of the motor. It will be obvious if it is going bad.

Sounds like a bad spring or the drive gear is going bad. Take a good look at the springs above the door. It is sometimes hard to tell when one is broken. Remove the cover and look at the gear. It is obvious when this is going bad.

The most common cause of this problem is a bad wall control the wiring going to it. You can eliminate both temporarily by removing the wire at terminal 1 on the back of the motor unit. The wiring sometimes is shorted by the staples the installer uses. The wall control gets used a lot.

your sensors may be bad. the little eyes on either side of the door

IT MAY BE AGAINST THE TRAVEL LIMITER BOLT.

IF IT IS YOU WILL NEED TO UNPLUG THE UNIT REMOVE THE COVER AND TURN THE MOTOR BY HAND TO BACK OFF THE PRESSURE.

MAKE SURE YOU GO PAST THE LIMIT SWITCH.
ADJUST THE LIMIT SO TH DOOR DOES NOT HIT THE BOLT.

HOPE THIS HELPS