My westinghouse flat panel lcd will not work with the cable or fios boxes hooked up was ok with just the cable plugged in but when you try to hook a digital box it works for a few days and then no signal. also the cable company has replaced the splitter to i t 3 times and it works for a day or so.

SOURCE: Sony HDTV flat - no picture with HDMI cable and Verizon FIOS box

Probably a handshake problem with the cable box. It is common for cable boxes to have HDMI handshake problems. Hook the box up using the component cables and you should be fine

SOURCE: Westinghouse LVM-37w1

I have had this problem since about superbowl time. If I powered the set off, waited 15-20 seconds, and then powered on, it would work again for a while. Repeating this drill a number of times would lead to stable operation. We resorted to a course of turning on some XM music from DirecTV when we weren't watching. I tried a technician knowledgeable on this set, and it would have cost $500-800 to repair the set. We learned from different forums that the likely culprit was either the power supply board or the LCD controller. We also picked up the rumor that Westinghouse had quit making replacement part. It would seem that the management of this organization has a death wish. TO THE CHASE: shopjimmy.com is now selling parts from canibalized sets. They have a non-DOA warranty and a good return policy. A power supply from "Jimmy" solved my problem. I have one important hint: To remove the back, take out the obvious screws and the base. Then remove the ~5/8" rods that protrude from the bottom. There is a screw up inside each rod.

SOURCE: can't get all digital channels

There are several possibilities assuming you have an outdoor antenna with the amplification. You are too far from the transmitter or the station is still on a low power digital transmitter until the analog broadcasts end. Additionally, there may be buildings, hills or trees in the way. The first one is called the digital cliff - you either have enough signal for your tuner or you don't. Some stations may need to add transmitters to cover the secondary areas that could still receive the analog signal. The second possibility will either resolve on Feb 18 or June 12 or anywhere in between. (It will depend on your station and the Digital TV transistion delay bill. Some stations are changing frequencies with the transistion and can't go to full power until another analog station moves its frequency.) The last one can't be resolved.
If you have an indoor antenna, you can try moving it around to get better results. My household has an amplified outdoor antenna with a rotator to get the antenna to line up with the signal. We have two analog stations that give problems when we look for their digital signals. We hope the issue will resolve with the changeover since we have seen the signals on both stations improve when they wanted to broadcast football games.

SOURCE: I need to hook up to digital cable

Thank you for your time.
I turned on the router supplied by Verizon, which I did not do yesterday, I'm embarrassed to say....
I called Sanyo and received step by step how to set up.
It was the same procedure I used yesterday with the exception of making sure the router was on,

I apologize for any inconvenience.

Reva L,

SOURCE: Westinghouse 1080P 42" LCD TV - HDMI stopped working

I know this is late, but this happens frequently. If anyone else has the same problem try unplugging the TV for 60 seconds. Plug it back in and then hold the power button down for 30 seconds. That will reset the TV.
You should see the Westinghouse logo come up and the HDMI should work. This has happened twice with my TV in 1 year.