The update was successful because the "Language" display on the front panel is the first screen to select the menu language. The standby power button is inoperative in this initial set-up menu and only way to power off is to remove the power plug. The monitor is simply not displaying the STB video output. Doesn't sound like anything is corrupted, but rather that TV monitor isn't supporting the current video resolution or refresh rate setting output from the STB. This could be a result of an AV handshake error between the STB and the TV monitor, an older HDMI cable (non version 2.0), or a TV with an incorrect menu setting for handshake, or a monitor that only supports a limited type of resolutions or on the 60hz refresh. Several options to resolve: Do you have a different TV or computer monitor to temporarily connect the STB HDMI cable to test? Usually you will find that a different TV or computer display will allow you to see the AV menu and manually set the STB video output resolution and refresh rate to setting that most North American TVs are capable of displaying. I would manually set the resolution to 720p and the refresh rate to 60hz. Many inexpensive TVs sold in North America support only 60hz and often a maximum resolution of 720p. This can cause a display problem when connected to devices with the video output being set to higher unsupported resolutions or to a 50hz refresh rate. Is the HDMI cable v.2.0? If not, the handshake to negotiate the resolution and refresh rate may not be supported. Try a different HDMI if you have one. Remove the power cord from the STB for a few seconds. Replace the power cord to force a new HDMI handshake. Switch the TV monitor off of the HDMI input then back to the HMDI port. Check the TV monitor's HDMI CEC (link) settings and set to on or auto. If you continue to not see a video image, give me a call!