HP monitor M27ha external monitor detected while connecting to MacBook but no display

[ramvarsha09]

All of my MacBooks suddenly stopped displaying in HP external monitor.  Monitor is detecting but no brightness, all the menu buttons in monitor seems to be locked.

[Kuroi_Kenshi]

Hi @ramvarsha09,

Welcome to the HP Support Community! 

Thanks for reaching out about your query regarding Hp Monitor with no display!  

We're thrilled to have the opportunity to assist you and provide a solution.

Try these steps:

1. Check Monitor Input Source

• Press the Menu button on your monitor.
• Navigate to Input Source and ensure it is set to HDMI or DisplayPort (whichever cable you're using).
• If buttons are locked, hold the power button for 10-15 seconds to unlock them.

2. Adjust MacBook Display Settings

1. Go to: System Settings → Displays.
2. Click Detect Displays (if available).
3. Try changing the refresh rate to 60Hz.
4. Set Resolution to Scaled and pick a lower one like 1080p.
5. If "Mirror Displays" is on, try toggling it off.

3. Reset Monitor & MacBook Connections

• Unplug the monitor's power cable and HDMI/DisplayPort cable for 5 minutes.
• Restart your MacBook.
• Reconnect everything in this order:
  1. Connect the power cable to the monitor.
  2. Connect the video cable (HDMI/DisplayPort).
  3. Turn the monitor on before the MacBook.

 

[Kuroi_Kenshi]

4. Try a Different Cable or Adapter

• If using an HDMI to USB-C adapter, try a different one.
• Test with a different HDMI/DisplayPort cable.
• If possible, try another monitor or TV to check if the issue is with the MacBook.

5. Reset NVRAM & SMC on MacBook

NVRAM Reset:

1. Shut down your Mac.
2. Turn it on and immediately press & hold:
   Option + Command + P + R for 20 seconds.
3. Release and let it restart.

SMC Reset (for Intel Macs):

1. Shut down your Mac.
2. Hold Shift + Control + Option + Power for 10 seconds.
3. Release and turn it back on.

6. Check macOS Updates & Drivers

• Go to System Settings → General → Software Update and install any updates.
• If you recently updated macOS, check if others are having display issues with that version.

Let me know if any of these step's work or if you need more help! 😊

I'm glad I could help! 😊 If this resolved your issue, please mark it as "Accepted Solution" and click "Yes" on "Was this reply helpful?"—your feedback not only keeps us going but also helps others find the solution faster! 👍✨

Take care and have an amazing day ahead! 🚀

Best regards,