Troubleshooting
TV antenna picture is pixelated or breaks up? Check reception first
When antenna channels pixelate while apps and HDMI look normal, check the antenna cable, affected channels and reception. Fix that signal path before rescanning; a rescan cannot strengthen a weak signal.
Published by TV Remotely · Source checked 2026-10-29. Model and firmware behavior can differ; device tests are named only where performed.
Check whether the breakup is limited to antenna TV
If only tuner channels pixelate while HDMI and apps look normal, focus on the broadcast path: antenna connection, reception, and the affected channel. If every input breaks up, the cause may be broader than antenna reception. Manufacturer guidance treats weak or unstable signal as one cause of artifacts; there is no single signal-strength percentage that applies to every tuner and market.
Check whether one channel or all antenna channels are affected.
A single-channel problem can point to that station or reception conditions; multiple channels suggest checking the antenna path.
If that does not help: Try another known channel and note whether the issue changes with weather or time.
Inspect the coax connection at the TV and antenna, and reposition the antenna according to its own instructions.
A loose cable or poor placement can reduce reception.
If that does not help: Avoid adding splitters or amplifiers without identifying the signal issue; excess amplification can also be unsuitable.
Check the TV’s tuner signal information if that model provides it.
Signal-quality readings can help compare channels on the same TV.
If that does not help: Treat the reading as model-specific guidance, not a universal pass/fail threshold.
Rescan only after checking the signal path
If channels disappeared after an antenna move, cable change or retune, use the TV’s antenna/channel scan. A rescan does not repair a weak or intermittent signal, so fix the connection and placement first. Keep notes of affected channels and signal conditions if reception remains unstable; local broadcast support may be needed.
What to do next
Check antenna connections and affected channels before rescanning; tuner strength readings have no universal threshold.
Sources and verification
- Sony: weak or missing direct antenna/cable channels — checked 2026-10-29
- Samsung: reception and source checks for picture breakup — checked 2026-10-29
Frequently asked questions
- Should I rescan whenever the picture pixelates?
- Not necessarily. Check the antenna connection and reception first; rescanning is most relevant after a setup or channel lineup change.
- What is the ideal antenna signal percentage?
- There is no universal percentage across TV tuners and regions. Use the reading comparatively and follow the TV model’s documentation.