In an effort to be frugal we're spending a small fortune. The laser on our 18 mo. old Zenith DVD/VCR (ZDX313) blew out so we thought we'd be clever and purchase a cheap DVD player (Memorex MVD2042) and route it through the Zenith which is connected to our receiver and cable TV. The audio works superbly however we can't seem to get the Zenith to ackowledge the disc from the new DVD player. We're purchased S and RGB cables and tried both options of connecting to the Zenith to no avail. The Zenith indicator always reads "no disc" even though we have a disc playing in the Memorex. Our TV has only a cable hookup so direct connection isn't an option. Any ideas??