Unfortunately, there is no newer firmware than installed on tv. Mainboard was replaced in aurthorised service of Toshiba. I suspect, that the problem may by in software or I have a bad luck and second mainboard is faulty too.
Hi
I have a problem with my Toshiba TV. Once set up, the TV works normally for 2-3 weeks. Then the picture disappears. Only screen graphics are displayed like EPG, it is sound and no picture. Signal has a very good strength and quality. The image is lost only on DVB-T, it works on HDMI or VOD...