Symptoms
- Wide bands of solid or shifting color across the screen
- Bands appear on every input and app
- Bands shift position when the TV is tapped or moved slightly
- Started suddenly with no clear trigger
Likely causes
- CommonLoose ribbon cable connecting the T-con board to the panelThis cable can loosen from vibration, moving the TV, or normal aging.
- CommonFailing T-con (timing controller) boardThis board manages how image data is sent to the panel, and its failure often shows as color bands.
- PossibleDamaged panel from physical stressPressure or impact damage can show as persistent colored bands rather than cracks.
What to do
- Confirm the bands appear on every input, including the TV's own menu screens.
- Power cycle the TV by unplugging for a full minute.
- Gently tap the edges of the TV frame (while off, then check when back on) to see if bands shift, which can indicate a loose internal connection.
- Take photos or a short video of the bands to show a repair technician.
- Avoid pressing directly on the screen itself, which risks further panel damage.
- Get a repair estimate and weigh it against the TV's age; T-con board replacement is often cost-effective on newer TVs.
Tools and parts
T-con boardSearch: “TV T-con board replacement for model”
When to call a pro
Colored bands across the screen typically need a technician to replace the T-con board or reseat internal cables.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.