You have to put the television on and off (with the TV remote) . Have the same problem.
SOURCE: Proview HX303 30 in. HDTV-Ready LCD
Inverter board is tripping protective circuit. Check Caps!!! or Ballast's.
SOURCE: hello. i have a proview mh-462su plasma
The fact that the set no longer allows you to turn it off indicates that the power supply for the power control circuit isn't supplying the voltage it should or none at all.
The service voltage for the circuit that provides IR (remote) control and probably any set-mounted controls as well, is the primary supply.
I believe the high voltage for the plasma display is working but the signal (video) input is scrambled due to a failure of an output (or more than one) of the primary supply that provides voltage to the video and audio sections.
Try following the instructions I have pasted below:
Unplug your set overnight to allow potentially
hazardous voltages to discharge, remove the back panel of the set so you can
see the guts.
Look for a smaller board with larger parts on
it; some cylindrical (capacitors), others block-like and relatively large
(chokes and transformers).
You should also see a relationship between the
board and the incoming AC.
Check the board for a label or if not present, a
stamped-on number.
Call the manufacturer's service center with your
TV model number and the number found on that board and inquire about
repair/replacement costs; if both are offered, they won't be that much
different.
If you must buy a new board, don't dispose of
the failed one as there are smaller companies that can repair it for less than
the mfr. and then keep it as a spare as this problem will likely arise again.
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SOURCE: when watching tv froze made
The power supply board is dead.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
I followed the steps at the following link and it worked for me. I have a 2007 Toshiba Regza 42HL67, but the firmware applies to many models as documented in the readme file at the location found via the link below. I used a 1gb SD card formatted FAT16, copied the unzipped files and folder to the card (wasn't sure if it required the top level folder or only the files under the top level folder so I copied both to the root of the SD card), unplugged the TV, inserted the card, plugged in the TV, waited 2.5 minutes, unplugged the TV, removed the card, plugged in the TV, yellow light flashed 3 times and went out. I turned on the TV and it has worked normally since last night.
http://www.benjammin.net/www/pages/techtips/Toshiba-Regza-42HL167.html
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