Question:

How to fix HDMI 4 not working on Q85RA, Q90RA, and Q900RB Series TVs?

Answer:

To resolve the issue of HDMI 4 not working on your Q85RA, Q90RA, or Q900RB Series TV, follow these steps:

Ensure your TV's firmware is up to date. Download the latest firmware from Samsung.com and update your TV using Over The Network (OTN) or via USB. Choose the correct region and firmware version for your TV:

After updating the firmware, the TV will turn off and on automatically. Once this is done, manually turn off and on your TV again to update the sub-micom.

Verify that the sub-micom is now on version 6012 by checking the "About This TV" menu. It should display T-MMOCJP-6012.

Terms:

HDMI: High-Definition Multimedia Interface, a type of cable and connector used to transmit audio and video signals between devices.

OTN: Over The Network, a method of updating device firmware through a network connection.

USB: Universal Serial Bus, a common way to connect peripheral devices to a computer or TV.

Firmware: Software that controls the basic functions of an electronic device.

Sub-micom: A secondary microcontroller within the TV responsible for managing specific features or functions.

ATSC, DVB, ISDB: Standards for digital television broadcasting in different regions (Advanced Television Systems Committee, Digital Video Broadcasting, Integrated Services Digital Broadcasting).

Do not setup Service.