Hi Saud52,
Seems Toshiba cheapies now use Chinese panels which give just the problem you mention. I know them as 'UMC sets' under various brands and have never managed to sort one although some programmed Eeproms are available - Never work though.
Note one Eeprom supplier suggests the M'Proc is liable duff if an Eeprom doesn't sort it - Confess binned every one and have seen several in most every screen size - Biggest a 55 inch Blaupunkt.
At least with a 'Vestel' we had a chance as they do schematics, and heaps of panels on Ebay - Chris.