Applies to: Sony models covered by the HX920 legacy screen guide with Target Inputs; other models require their own documented equivalent.
The useful distinctions
- The cited Sony guide supports current-input or shared screen-setting memory.
- Its normal mode preserves a 4:3 picture with sidebars.
- Its full mode can enlarge a 4:3 picture horizontally.
Confirm the memory feature
Use the model manual first. The cited legacy guide documents a current-input and common-memory distinction, but that does not establish an identical feature on every Sony TV. Without documented per-input behaviour, report the two framing outcomes and leave their storage mechanism unknown. This prevents a plausible explanation from turning into an invented menu procedure.
Keep the source reference constant
The same border-and-circle image is more useful than comparing two unrelated programmes. Record the active output mode and the selected picture-sizing state on each input. If a different source is required for the second input, that change weakens isolation and belongs in the report. A second input’s success does not prove the first input is electrically defective.
Use configuration evidence before repair claims
When the framing difference follows documented retained settings and disappears after a reversible alignment, the user has a configuration explanation for that reference. Check the original programme afterward, because intentional bars may still remain. If the reference remains different under equivalent supported settings, preserve the result for the manufacturer rather than repeatedly copying settings whose applicability has not been established.
A focused way to proceed
- Confirm the exact model supports per-input or shared screen settings.
- Send one owned reference to the first input and record framing.
- Compare the same reference and common output on the second input.
- Inspect each input’s documented target-memory state.
- Make one reversible supported comparison and restore the starting values.
Worked example · synthetic
Hypothetical example: the same 4:3 reference is stretched on one supported input and correctly proportioned on another; their documented input-specific screen states differ. Aligning those states restores matching proportions, with no claim about a modern TV’s menu structure.
When to stop or ask for help
Keep this guide model-bounded. Do not infer a per-input memory feature or identical labels on unsupported models.