What might cause this?
Similar symptoms can have different causes across models and software versions. These are possibilities, not a diagnosis.
Possible causes
- Cable or adapter connection may be loose.
- The display may be set to the wrong input.
- Windows projection mode may be incorrect.
- The graphics driver may be unstable.
What can you try?
Try these safe, user-level checks in order; do not open the device. Menu labels may differ by version.
- 01
Step 1
Check power and select the correct HDMI/DisplayPort input on the display.
- 02
Step 2
Check both cable ends and compare a known-good cable or port.
- 03
Step 3
Press Windows+P and select Extend or Duplicate, then try Detect in Display settings.
- 04
Step 4
Test with one monitor and no dock/splitter; compare another PC.
- 05
Step 5
If it began after an update, review driver update/rollback guidance from the manufacturer.
How can you confirm the fix?
When the desktop appears, confirm resolution and refresh rate are supported.
When should you contact service?
Seek authorised service for suspected damaged display ports or GPU hardware.
⚠ Stop using a device if it overheats, shows liquid damage, smells burnt or has a swollen battery.
Will a repair cost money?
Settings, cables and user checks may require no repair. Hardware costs depend on the exact model, warranty and service diagnosis; no fixed price is promised.
Quick answers
Could these checks affect warranty?
Use only external checks recommended for end users by the manufacturer. Opening batteries, electronics or sealed parts can create safety and warranty risks.
What if the steps do not help?
Write down your model, software version and test results. Share those details with official support rather than repeating potentially unsafe actions.
How was this sourced?
This is an original summary of the manufacturer support document; use the official page for current, model-specific instructions.
Open official manufacturer document ↗Features and model coverage vary. Compare the source with your exact model.