Hello and welcome to JustAnswer!
What source are you viewing on your Sanyo TV? (Satellite, Cable, DVD, TV?)
If your volume is turned up and the Mute function has not been activated, then the problem is caused by an internal failure.
This could be in either the power supply board or the main logic board.
To have the power supply board repaired will cost around $150.
To have the main board repaired will cost around $300.
Pete, Did you read my updated Post? My husband found the problem, but we will pay $17 for your trouble. Is that OK? If so, please adjust our Pay Pal payment. Thank you so much. We will use you again.
Hi, just got your updated post. Thanks for letting me know you got it sorted.Your Paypal payment is held until you click Accept.Please click Accept if you are happy with my assistance and I will get Customer Services to adjust your payment.
Many thanks for using JustAnswer!
OK Pete. Thanks! Just have Customer Service adjust PayPal from $30 to $17. I appreciate your time.