KeyTestDIAGNÓSTICO DEL DISPOSITIVO
Todas las pruebas
Funciona localmenteSin cuentaSin instalación

PRUEBA DE HARDWARE ONLINE

Prueba de Monitor Externo

Comprueba la salida de vídeo de este ordenador en un monitor o televisor conectado.

MULTI-SCREEN CONNECTION LAB

Verify this computer can drive another screen.

Test one video-output port at a time with a known-working monitor and cable, then inspect the signal this computer produces.

READY TO CHECK

Use a monitor and cable you already know work.Connect them to the HDMI, DisplayPort, USB-C or dock output on this computer that you want to test. The known-working equipment acts as the probe.

DISPLAY TOPOLOGY— active
PrimaryExternalPosition reflects the operating system layout when available.
PHYSICAL OUTPUT RESULTS0 / 1 recorded

Name the exact port, adapter or dock path you tested. Browser display labels cannot reliably identify the physical connector.

CURRENT SCREEN—Reported resolution
AVAILABLE AREA—Excludes system UI
BROWSER VIEWPORT—Current content area
PIXEL RATIO—Display scaling
COLOR DEPTH—Browser reported

IF THE SCREEN IS STILL BLANK

Isolate this computer's output step by step.

The monitor and cable should be known-working before you judge the computer's port.
  1. 1

    Use known-working equipmentConfirm the same monitor and cable work with another source.

  2. 2

    Test one computer portConnect directly where possible, without a dock or adapter.

  3. 3

    Enable the external outputSelect the matching monitor input and choose Extend or Mirror in system settings.

  4. 4

    Compare another outputIf available, repeat with another port to isolate this computer's faulty path.

WindowsWin + P, then choose Extend or Duplicate.macOSSystem Settings → Displays → Detect Displays.ChromeOS / LinuxOpen system display settings and enable the connected output.

INFORME DE DIAGNÓSTICO LOCAL

Prueba de Monitor Externo resultado

Run detection with a known-working monitor and cable, then record the physical output used in the notes.

Not checked
Active displays
Not checked
Advanced screen API
Not checked
Current screen
Unavailable
Detected labels
None
Physical output results
HDMI / video output 1: Not recorded

Qué confirma este resultadoWhether this browser session could observe multiple active display outputs after the manual connection was made.

Qué no puede demostrarElectrical health of every connector pin, cable bandwidth at every mode, or which physical output produced a detected display when the browser hides that mapping.

Detecting another screen confirms that this computer produced an output the operating system and browser could see. It does not electrically certify every pin in the tested port.

SOBRE ESTA PRUEBA

Respuestas rápidas sin instalar programas.

Comprueba la salida de vídeo de este ordenador en un monitor o televisor conectado.

Limitación del navegador: El diagnóstico del navegador ofrece señales útiles, pero no sustituye una inspección física o reparación profesional.

Los datos de diagnóstico se procesan localmente y KeyTest no los sube.