40" LCD TV getting power to the tv but there is no picture
SOURCE: Hisense TL2020 LCD TV
Try turning the main power switch on the back of the tv off.
Then hold the menu button and push that switch back on while still holding the menu button.
Keep holding the menu button until the setup menu pops up.
Next, be sure your input is set correctly(air or cable).
Next, do an auto channel search.
That
did it for me. After I shut it off I had to do it one more time but it
did the job. A friend of mine gave me the tv for free because nobody he
new could figure it out. I took it home, got lucky, and figured it out
in about ten minutes.
Hope this works for you.
jb
SOURCE: Hisense LCD Tl2020
I, also, have the Hisense LCD 1504 and cannot turn it on with the original remote. I have to use the ON button on the side every morning. You have to hold this button in for a while then wait a while and presto, the blue button shows on the front and the picture comes on. If it fails to work the first try, just try try again. It does work for me this way. We had this same experience with the TV in our room at a Hotel where we were on vacation and the TV worked fine when we turned it on using the side ON button. It just takes a while for the picture to appear. Hope this clue will help someone.
SOURCE: Power Supply Board for SAMSUNG 40" LCD TV Model LA40R81BX
You'll find some Samsung power supply boards here : http://www.usefulparts.com/index.php?main_page=index&manufacturers_id=11&sort=20a&filter_id=98&alpha_filter_id=0
but you have to open your TV first and find out model number
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