Start with a clean baseline
Input and output are separate paths. Prove left/right playback and microphone capture independently before blaming Bluetooth, the app or the entire headset.
Live evidence
Relevant checks
Dead Pixel TestShow solid colors full-screen so you can visually inspect for dead or stuck pixels.
→Screen Gradient and Banding TestDisplay smooth gradients to inspect visible color banding.
→Screen Color TestDisplay full-screen red, green, blue, white, and black reference screens.
→Left Right Speaker TestPlay left and right channel tones separately.
→Screen Resolution TestShow browser viewport, screen dimensions, and device pixel ratio.
→First sequence
Do the high-signal checks before risky changes
- 1
Separate built-in app vs HDMI/source problems
- 2
Try another known-good source/cable for input issues
- 3
Use TV self-diagnostics/service support for persistent panel/audio faults
Decision points
What the result should change
If playback passes but microphone failsKeep the diagnosis on input selection, headset profile, mute/gain or microphone hardware.
If only one channel failsCompare cable/earcup/driver and balance settings rather than reinstalling all audio drivers.
If browser audio passes but conferencing audio failsPrioritize the conferencing app's device routing and processing.
Browser can help check
- Display reference patterns if opened on/through the TV
- Generate stereo/channel audio tests
Browser cannot prove
- Read HDMI handshake/eARC state universally
- Run panel service diagnostics
- Measure HDR/color accuracy professionally
Repair boundary
Know when to stop browser troubleshooting
- High playback levels can damage hearing; use moderate levels during tests.
- Bluetooth codec/profile negotiation is not fully exposed to websites.
- Battery swelling or heat in wireless audio devices requires service/disposal guidance.
Used-device inspection
What to verify before paying or signing off a repair
- Left/right and frequency sweep at safe level
- Microphone recording and mute controls
- Wired/wireless connection modes and charging behavior