Laptop not connecting with external monitoe

[Vyom8]

My HP Laptop Pavilion 15CB is not connecting to an external monitor which is Dell S2240L it is showing going in power saving mode. I have tried everything. I connected it via HDMI port. I have tried updating my drivers. My monitor is working with some other PC and my laptop is also connecteing to a projector with same HDMI wire and it is also working. Please help.

[Deep_World]

Hi @Vyom8,

Welcome to the HP Support Community!

Thanks for reaching out!

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

Sorry for the inconvenience caused don’t worry let me help you.

To better understand the issue, could you please provide a few more details?

• When you connect the Dell monitor, does Windows detect it at all in Display Settings, or is it completely absent?
• Have you tried using a different HDMI port mode (if your monitor has multiple inputs like HDMI/VGA)?
• Does the monitor show “No signal” before going into power saving, or does it stay blank?

 Troubleshooting Steps You Can Try:

• Check Display Settings: Right‑click on the desktop → Display settings → Detect. Sometimes Windows doesn’t auto‑recognize the monitor.
• Force Projection Mode: Press Windows + P and cycle through Duplicate, Extend, and Second screen only. This can force the laptop to send a signal.
• Update Graphics Drivers: Even if you updated drivers, try downloading the latest directly from NVIDIA/AMD/Intel (depending on your Pavilion 15CB’s GPU).
• Monitor Input Source: On the Dell S2240L, manually select HDMI as the input source from the monitor’s on‑screen menu. Auto‑detect can fail occasionally.
• Try Lower Resolution: Set your laptop’s display to a lower resolution (like 1920x1080) before connecting. Some monitors reject unsupported resolutions.
• BIOS & Firmware Updates: Check HP’s support site for BIOS updates and Dell’s site for monitor firmware updates.
• Test with Another HDMI Port/Adapter: If your laptop has USB‑C, try a USB‑C to HDMI adapter to rule out issues with the HDMI port.

I hope this helps.

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,

Deep_World


 

[Vyom8]

in my laptop it does not detect my dell screen shows just going in power saving mode

I have tried using diff hdmi cable because my laptop does not have vga

It doesnt show no signal and i have also selected hdmi in my monitor

It doesnt recognize my monitor even thou my monitor works with my cctv driver as monitor

even tried win+p and updated my graphic resolution is also set as per my monitor 1920x1080

HELPPP

[Deep_World]

Hi @Vyom8,

Thanks for your response. 

Further Troubleshooting Steps

1. Check Device Manager
   • Press Windows + X → Device Manager → Display adapters.
   • Right‑click your graphics adapter (Intel/NVIDIA/AMD) → Uninstall device (check “Delete driver software”).
   • Restart your laptop and reinstall the latest driver directly from the GPU manufacturer’s website.
2. Test Monitor on Another Input
   • If your Dell S2240L has multiple HDMI ports, try switching to the other port.
   • Alternatively, test with a DisplayPort‑to‑HDMI adapter if your laptop supports DisplayPort over USB‑C.
3. Force Detection via Intel/NVIDIA Control Panel
   • Open your graphics control panel (Intel Graphics Command Center or NVIDIA Control Panel).
   • Look for “Detect Displays” or “Set up multiple displays” and manually force detection.
4. Run HP UEFI Diagnostics
   • Restart your laptop and press Esc → F2 to enter diagnostics.
   • Run the Display/Video test to confirm the HDMI port is functioning correctly.
5. Try Safe Mode

• Boot into Safe Mode and connect the monitor. If it works there, a background driver or app may be interfering in normal mode.

If after these steps the monitor still isn’t detected, it may point to a hardware issue with the HDMI port on the laptop

Regards

Deep_World