TV guide
Lines on Your TV Screen? What They Mean
Understand horizontal and vertical TV screen lines and when a repair is realistic.
Lines across a TV picture can come from the source device, the cable, the T-con board or the display panel itself, and the pattern offers useful clues.
What the symptoms can mean
A single thin line suggests panel damage. Flickering groups of lines across the whole picture may indicate a board or connection issue, especially if they move with content.
What to do next
Test another HDMI source and cable first. If lines appear on every input, arrange a diagnosis. Do not press the screen, as pressure can spread panel damage.
Board repair versus panel replacement
When the fault is the T-con or a driver board — usually shown by lines that flicker, shift or cover the whole picture — the repair is a straightforward board swap at a reasonable cost. A permanently fixed line or block usually means panel damage, and replacement panels frequently cost more than a new television. A proper diagnosis tells you which situation you are in before any money is spent.
Preventing further panel damage
Never press on lines or dark areas to 'test' them — pressure spreads panel damage instantly. Keep the TV away from humid corners, use a surge protector during storms, and clean the screen with a dry microfibre cloth only. Lines that appeared after a knock or transport should be assessed sooner rather than later, since early panel faults sometimes stabilise with treatment.
When to arrange a diagnosis
If the problem continues after safe basic checks, a proper diagnosis is the best next step. It helps separate a replaceable part from a deeper board, power or software issue before any repair is approved.
Common questions
Can lines on a TV be fixed without replacing the panel?
Yes, whenever the cause is a board or connection rather than the panel itself — which the pattern of the lines usually reveals during diagnosis.
Do screen lines get worse over time?
Often yes, especially when the panel is damaged. Board-related lines can stay stable for a long time, which is why identifying the cause early matters.
