Hisense MT5659DUHT Service Manual page 25

4.2 USB main software upgrading with SecureCRT(forced upgrading)
When USB software upgrading with Remote control fail , We can upgrade with debug
serial board Tool and SecureCRT Tool .
 Run
SecureCRT.exe

AC power on the TV , at the same time tightly press the "ESC" button on the PC until appear
character
"DTV>"
Behind the character "DTV>",Write lower-case letter "u" and press enter key to ensure.as
following.
 TV will upgrade automatically ,the TV process as same as 4.1.
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