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I need usb firmware for toshiba 55U7750VE problem is tv set on and blank screen and no remote opreation I check with another motherboard so indeed firmware pls help me

Main board number 5844-a9k02t-0p10

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Connect tv with power
Turn on from remote , update will start
After ready tv let us know

Ok sir thank u I will try and tell u later

Still no answer??

Firmware not taken sir

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upgrade_loader_common.pkg