Philips has the FAQs and manuals for the 42MF52D/37 here: http://www.m4c.magnavox.com/cgi-bin/cpindex.pl?ctn=42MF521D/37&mid=Link_FAQs&scy=US&slg=AEN
. The direct link to the User's guide is http://download.m4c.magnavox.com/files/4/42mf521d_37/42mf521d_37_dfu_aen.pdf
. You will need Adobe Reader of a similar program to read the manual.
Is there a specific problem you are having with your set? (OTA or cable setup or another issue) Please add a comment if you would like additional support. Note: digital OTA signals are subject to a "cliff effect" if your tuner doesn't get enough data from the antenna. This will be determined by the tuner, the antenna location (indoor, outdoor, elevation), distance from the transmitter, and any splitters or other wiring problems. I've seen failed amplified splitters turn into filters that block the incoming signal from reaching the TV.