So last night I hit the button on the remote control to close my 30
year old garage door. Just as the door was about closed, I heard a
loud pop. Turns out that the one of the wires that attaches the one
of the long springs to the door has broken, leaving me with only one
of the big springs still working. The opener will still open and
close the door, but I can tell it's working a harder than it used to.
How urgent is the need to replace the thick wire that attaches the
spring to the door? Is this something that a garage-door rookie can
do? I know garage door replacement is something best left to the
pros, but I'm hoping I can handle this repair on my own.

Thanks for any info...

Mike