An artefact fixed to the same physical screen position across menus and different sources suggests a display-related issue. A mark that moves with the programme or appears only in one source suggests a different cause. Use simple comparisons and manufacturer support rather than pressing the screen or trying unverified repair tricks.
Compare different content paths
Open a normal device menu, another app and a different authorised programme. Observe whether the mark stays in precisely the same place on the panel. Do not confuse a channel watermark or a subtitle symbol with a physical pixel defect; those belong to the content and can move or disappear when the source changes.
Avoid damaging experiments
Do not rub, tap or heat the panel in an attempt to fix a dot. Use only diagnostic or maintenance functions documented for the exact television. Some display technologies have model-specific care procedures, and applying an unrelated online method can create a larger problem than the original symptom.
Provide clear evidence
Record the television model, approximate location and whether the mark appears across inputs. A photograph can help equipment support if it shows the relevant area without private account information. If the artefact exists only in one programme, instead provide its title and time to the source provider. The distinction prevents unnecessary account resets or app reinstalls.
