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VN Service Manual
Problem #9: Black spot or Partial screen is dark
Step 1: Replace optical bonding module.
Problem #10: Vertical line or Horizontal line
Step 1: Replace optical bonding module.
Problem #11: Noise image or colour distortion
Step 1: If only OPS source has this issue, replace the OPS docking board or HDMI cable that
between OPS docking board and Mainboard.
Step 2: If all source included the Android all has this issue, replace the Mainboard, T-CON board
and LVDS cable one by one.
Step 3: Replace optical bonding module.
Problem #12: Flicker screen
Step 1: Replace Mainboard at first.
Step 2: Replace T-CON board and clean the FFC cable of T-CON.
Step 3: Replace optical bonding module.
Problem #13: Stuck on splash logo, can't enter into homepage
Step 1: Reload FW for mainboard.
Step 2: If it not work, replace Mainboard.
Problem #14: Always show different colour lines in screen after start.
Step 1: Replace T-Con board, clean FFC cable of T-CON, Mainboard, LVDS cable one by one.
Step 2: Replace optical bonding module.
Problem #15: Broken sound or sound popping
Step 1: It should be a speaker issue, replace the speaker.
Problem #16: No audio output from OPS
Step 1: Install audio card driver for OPS windows.
Step 2: Right click Speaker icon in the right side of Windows toolbar, select the "Audio device"
item, set "MStar Demo" speaker as default speaker device.
Step 3: Install all OPS driver.
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