The main board has failed and needs to be replaced.
If you need further help, reach me via phone at https://www.6ya.com/expert/steven_a67ead41eb5fc62a
SOURCE: I cannot get a signal on my Phillips 50
if you haven't unplugged the unit for 30 seconds, try that. otherwise, if that doesn't help, probably a board needs to be replaced. call phillips for service.
SOURCE: TV not finding Digital Channels from Cable Box
We have Comcast and we plugged the cable straight into our Bravia, searched for Digital Channels and it found 131. We actually get all the HD channels that we had using the box, plus a few more. It's worth a try.
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.
SOURCE: on a Daytek 46 in LCD TV, no AV Digital Cable Signal, but HDMI OK
Had the same problem.
Fixed by unplugging everything from the power source, leaving for 2 minutes then plugging back in.
Works fine now.
SOURCE: HDMI failure Samsung HL-R5087W 50 in HDTV
After reviewing the service manual for this set, the problem is is in the DIGITAL BOARD. To get the right Digital Board you will need the Version number of the TV.
Good luck
N Sabre
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