Hp M27f Display

[rakeshsharma-ma]

Hi,

I bought a Hp M27f monitor on 2021. It was not used for 2 years. When I power On yesterday, it worked well and no issues found. After using it, I power off and switch ON today morning, it doesn't work. HDMI Cable is connected during Power ON and Orange LED glow but the screen is black, No backlight. My cursor was moving to the monitor screen from Laptop (while HDMI connected to Laptop) but not able to see cursor in monitor screen since it is black.

[NonSequitur777]

@rakeshsharma-ma,

Welcome to our HP Community forum!

Based on the symptoms described, the laptop is successfully detecting the HP M27f monitor (which is why the cursor moves off-screen into the extended display space), and the monitor is receiving power (indicated by the Orange/Amber LED). However, the monitor's display panel is failing to illuminate.

An orange LED typically signifies that the monitor is in "Sleep Mode" or "Power Saving Mode" because it is not properly registering an active video signal, even though the laptop knows it is plugged in.

Here are the step-by-step troubleshooting steps to isolate and potentially fix the issue:

1. Perform a Hard Power Reset:

Electronics that have sat unused for two years can experience residual electrical charge issues in their capacitors.

• Disconnect the power cable and the HDMI cable from the back of the monitor.
• Press and hold the monitor's physical power button for 30–60 seconds. This drains any stored residual energy.
• Reconnect only the power cable and turn it on. See if an "Input Signal Not Found" or "Check Video Cable" message appears. If it does, the backlight works. Reconnect the HDMI cable.

2. Wake the Monitor / Cycle Inputs:

Sometimes the monitor gets stuck in a deep power-save state.

• While connected to the laptop, press the Menu button (or other control buttons) on the bottom right edge of the monitor to force the On-Screen Display (OSD) to wake up.
• Manually switch the input source to HDMI 1 or HDMI 2 using the monitor buttons, rather than relying on "Auto-Detect."

3. Clear the Windows Display Cache:

Since the laptop remembers the monitor from yesterday but is failing to handshake properly today, resetting the graphics driver can force a clean reconnection.

• On the connected laptop, press Windows Key + Ctrl + Shift + B.
• The laptop screen will flicker and beep. This restarts your graphics driver and forces it to re-detect connected displays.

4. Rule out Cable and Port Issues:

Even if it worked yesterday, a loose handshake or minor hardware fault can trigger sleep mode.

• Completely unplug both ends of the HDMI cable and plug them back in securely.
• If the laptop has multiple ports, try a different port AND/OR try the second HDMI 1.4 port on your monitor, or try a completely different HDMI cable.

Hardware Note (Potential Backlight Failure):

If the power reset doesn't work and the screen remains completely pitch black (even when pressing the menu buttons with no HDMI cable attached), unfortunately your monitor's internal inverter or the LED backlight strip may have failed.

To confirm this, shine a bright flashlight directly at the monitor screen from a close angle while it is turned on. If you can very faintly see the outline of your desktop wallpaper or windows under the flashlight, the monitor is working but the backlight itself has died.

Kind Regards,

NonSequitur777