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Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, the described symptom almost always point to an internal hardware issue. Are you then considering a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter and even perhaps a soldering iron?
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Would you still like to continue please?
Hi again Vicki,
Proposed preliminary tries (if have not been done):
First step then would be to determine the power supply board number; something like PA-3241-01TS-LF depending on the board version/revision.
And please click HERE for a multi-meter.
A friendly reminder; voltage measurements by its very nature requires that the Toshiba be plugged in and therefore LIVE! Please exercise due care and caution.
The power supply board would be inside the TV itself. It would look something like the circuit board shown HERE.
For Toshiba Australia, please click HERE or contact:
Have you tried clicking HERE ?
Yes Vicki, it would be fixable by Toshiba:
Good luck and thank you too for the opportunity to be able to share the information.