On 7/18/2015 9:26 AM, Dan Espen wrote:
Meanie writes:

On 7/17/2015 7:19 PM, bob_villa wrote:
On Friday, July 17, 2015 at 4:27:56 PM UTC-5, Thomas Day wrote:
I have an old Sears garage door opener (139.663900) that went dead
this week. Both the manual door opener button, my remote receiver
button, and the remote controls do not activate the opener
motor. The light on the manual door button is out, which sort of
makes me suspect a fuse (which I can't find) is out or the logic
board died. Any suggestions for returning this 1/3 horse opener to
life?

1st make sure you have AC to the unit (extension cord), then check
the output for the transformer (don't remember if it's 12 or 24). If
that checks out, look closely at the control board for burns or
cracked solder connections. I have a Chambelain that's identical. I
had to replace the nylon gears once in 30 yrs.

Just an FYI, Chamberlain is made by LiftMaster who also make the
Craftsman, which is why they are identical.

I suspect the board as well. If it is, it'll be more cost effective to
purchase a new opener.

Pretty sure I've replaced the gear and the board.
(Separate incidents.)
I don't remember the board being that expensive.
It's certainly less work to do just the board.

I also wanted to add, I would believe it depends on the age of the unit.
Since I had a much older unit, the board was more expensive. I would
think the boards of a newer unit would still be used in other units and
readily available.

Overall,you're correct,it is cheaper to replace the board than an entire
opener, but in my case, within a few dollars, a new unit was better.