I have a Toshiba 26AV500U TV. It has sound and blue light display but no picture. What part on the tv needs to be replaced?
Feb 24, 2016
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Product Troubleshooting for 32AV500U 32 in. LCD HDTV
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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.