What is the signal source for the TV? Make sure that you are on the correct input. Use the Input button on the remote. If you do not have the original remote, you need one that matches that function. (Often a Source or Input button is not available on the low end remotes.) Check that you have the signal set to Antenna or Cable if you are using the coaxial connection and the source is TV. (Menu > Setup > Channel Setup > Signal Type)
If your source is a computer, use the VGA port not the HDMI port. Computers send a different type of video signal than video set top boxes. The L37WD22 can't interpret the PC signal on the HDMI input.
For a set top box on the HDMI port, the unusable signal message indicates a communication issue. Try pressing the Info button on the remote. If you see an additional message of Acquiring Channel, then the set top box isn't responding to the remote. Check that the device is on and set up correctly to communicate with the TV. (For example, if your set top box offers progressive scan, try turning of that feature with the control for the box.)
The L37WD22 was built by TTE for the RCA label. The manual is available on the TTE support page.
The direct link to the User's Manual in English is
http://support.ttetech.com/RCATV/Assets/pdfs/L37WD22_16788070_IB_e-07.pdf .
I hope this helps.
Cindy Wells
Is that the same as the Serial #? If so, it's H294CU04W. That's the only other number I can find!
I have the same tv and we were watching tv and it came up unusable signal and I bought it from Aarons rent to own and they came out and they can not figure it out we even changed it to a different room and it still does the same thing, I supposedly have a tech making an appt to come look at it
The exact same thing happened to me (tv suddenly stopped to receive analog signal after about 6 months)
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