
to the site.
Sometimes remotes lose their programs if left without batteries for a while. Try leaving the batteries out overnight to see if the remore returns to default settings. Energy saving lightbulbs nearby can affect IR controllers.
How do you know the remote is working fine if it doesn't work the box? Was your friend playing about with the STB or the remote?
There is a list of jerrold codes at
http://www.remotecentral.com/features/r-rca.htm if the remote is programmable that may be worth a try.
Give customer services a call if you cannot get it working.