I'm trying to help a neighbor setup her used Mitsubishi CS-27EX1 tv for
cable that someone bought for her: no manual and no factory remote.

The physical buttons behind the small door are minimal:

A/V reset (not sure what this does)

Input: allows for DVD/VCR (this is working)

Vol (up arrow and down arrow)

Scan (up arrow and down arrow) allows for seven channels so
far with the cable hooked up.

Millenium Cable says that the on-screen menu needs to be opened
and the channel setup selected, but we can't find a way to
make any on-screen menu appear.

Again, no factory remote, but we have a low-end universal remote
that changes the channels, vol, etc, but the tv does not appear to
respond to the Menu button on the remote: I suspect that's for the
dvd menus.

Any help will be greatly appreciated.

--
George Newton