Audio Fix / setup help

Denon AVC-X4800H (EU), AVR-X3900H (NA) / AVR-X2900H (EU): restore a supported source hidden from the selection list

A real supported input is set to Hide; no unsupported connector/service invented.

Manufacturer-documented Reviewed 2026-11-09 · Revision 2

Follow these checks in Audio Fix →

When this guide applies

Denon AVR-X3900H (NA) / AVR-X2900H (EU). A real supported input is set to Hide; no unsupported connector/service invented. Exact AVC-X4800H controls already documented in its existing guide; receiver return output is MONITOR 1 for AVC-X4800H and TV 1 for the two AVR models.

Connection scope: Device controls / power only. Symptom: An option or codec is missing.

This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.

If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.

Checks and possible outcomes

Start at step-0. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

step-0

Is the missing source actually supported by this exact receiver?

An unavailable service or physical connector cannot be added with a visibility option.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

  • Manufacturer-documented Hide Sources AVC-X4800H ↗Hide Sources — Inputs > Hide Sources sets Show to use a source and Hide to omit it from the displayed selection.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.North American AVR-X3900H only. Known hidden input visibility only. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.European AVR-X2900H / DAB shared instructions. Known hidden input visibility only. · Source checked 2026-11-09

step-1

Inspect Inputs > Hide Sources for that intended input

Do not use Set Defaults or change its connector assignment.

Look for: Perform only the stated operation, then confirm it was possible.

  • Manufacturer-documented Hide Sources AVC-X4800H ↗Hide Sources — Inputs > Hide Sources sets Show to use a source and Hide to omit it from the displayed selection.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.North American AVR-X3900H only. Known hidden input visibility only. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.European AVR-X2900H / DAB shared instructions. Known hidden input visibility only. · Source checked 2026-11-09

step-2

Is it explicitly Hide, and do you want it selectable again?

An already shown or unknown state needs another explanation.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

  • Manufacturer-documented Hide Sources AVC-X4800H ↗Hide Sources — Inputs > Hide Sources sets Show to use a source and Hide to omit it from the displayed selection.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.North American AVR-X3900H only. Known hidden input visibility only. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.European AVR-X2900H / DAB shared instructions. Known hidden input visibility only. · Source checked 2026-11-09

step-3

Set only that input to Show

Leave every other source preference unchanged.

Look for: Perform only the stated operation, then confirm it was possible.

  • Manufacturer-documented Hide Sources AVC-X4800H ↗Hide Sources — Inputs > Hide Sources sets Show to use a source and Hide to omit it from the displayed selection.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.North American AVR-X3900H only. Known hidden input visibility only. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.European AVR-X2900H / DAB shared instructions. Known hidden input visibility only. · Source checked 2026-11-09

step-4

Does that input return to normal source selection?

Showing a source does not establish its cable or signal compatibility.

Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.

  • Manufacturer-documented Hide Sources AVC-X4800H ↗Hide Sources — Inputs > Hide Sources sets Show to use a source and Hide to omit it from the displayed selection.Exact model named in the retrieved manufacturer document header. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X3900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.North American AVR-X3900H only. Known hidden input visibility only. · Source checked 2026-11-09
  • Manufacturer-documented Denon AVR-X2900H official manual ↗PDF pages 1, 202 — Hide Sources removes unused source names from selection; Show uses the source again. Source Rename and Set Defaults are separate functions.European AVR-X2900H / DAB shared instructions. Known hidden input visibility only. · Source checked 2026-11-09

Possible result

Checks completed — report the actual result

Completion does not automatically mean the problem is solved. Report what actually happened; no physical test or measured repair is claimed.

steps completed

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

    Possible result

    Stop at the unconfirmed condition

    A required setup or response was not confirmed. Retain the actual observation and consult the exact source/partner manual or official support. Do not escalate to a reset, update installation, internal repair or unsafe wiring change.

    next support

    Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

      Possible result

      A required fact is unknown

      Confirm the actual model, connection, partner capability and state before continuing. Do not guess a menu, interrupt an installation or modify a live source by trial and error.

      insufficient data

      Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

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