The Dell Vostro 14 3445 uses the AMD Ryzen 5 7530U with AMD Radeon 660M integrated graphics. The HDMI port is connected to the Radeon 660M iGPU. When an external display shows no signal via HDMI, the cause is typically projection mode, the AMD driver state, or a resolution mismatch between the laptop output and the monitor capability.
Fix 1 — Set Projection Mode with Win + P
Press Win + P and select Extend or Duplicate. If the projection mode is PC screen only, the HDMI port does not output any signal and the connected monitor shows No Signal. This is the first step to check because it is the most common cause and requires no driver changes.
Fix 2 — Update AMD Radeon Driver
Visit Dell Support, enter the Vostro 14 3445 service tag, and download the AMD Radeon 660M driver. Install and restart. The AMD Radeon driver manages HDMI output including EDID reading from the connected monitor. A corrupted or outdated driver can cause the HDMI port to fail to output a signal even when the projection mode is set correctly.
After installing the AMD driver, open AMD Software and verify the external display appears under the Display tab
If AMD Software does not detect the external monitor, the issue may be with the HDMI cable or port hardware
Fix 3 — Test with a Different HDMI Cable
Replace the HDMI cable with a different one. HDMI cables can fail internally while appearing undamaged externally. A damaged HDMI cable produces a no signal result that is indistinguishable from a driver failure. Use a cable that is known to work with another device to confirm the cable is not the cause.
Fix 4 — Match Output Resolution to Monitor Maximum
In Display settings, if two screens appear (laptop + external), click the external monitor and set its resolution to match the monitor rated maximum (typically 1920×1080 at 60Hz for a standard monitor). If AMD sends a resolution or refresh rate the monitor does not support, the monitor shows No Signal or Out of Range. Lowering the resolution resolves this.
“My Vostro 14 3445 HDMI showed no signal on a new monitor. The monitor was set to DisplayPort input instead of HDMI. Switching the input via the monitor OSD immediately showed the extended desktop from the laptop.” — Rosnani Abdul Ghafar, school administrator
Frequently Asked Questions
About the Author Ryan holds a Computer Science degree and has spent over 15 years troubleshooting Windows hardware and driver issues across major laptop brands. He writes practical, step-by-step guides for everyday users at softwaredriverdownload.com.
Why is there no signal via HDMI on the Dell Vostro 14 3445?
The most common causes are the projection mode set to PC screen only, the monitor input not set to HDMI, a faulty HDMI cable, or an outdated AMD Radeon driver. Press Win + P and select Extend, verify the monitor input source is set to HDMI, and update the AMD driver from Dell Support if the issue persists after checking cables and input selection.
Does the Dell Vostro 14 3445 support 4K HDMI output?
The Dell Vostro 14 3445 HDMI port supports up to 4K at 30Hz via HDMI 1.4. For 4K at 60Hz, a USB-C to DisplayPort adapter is needed if the Vostro 14 3445 USB-C port supports DisplayPort Alt Mode. Check the Dell spec sheet for your specific Vostro 14 3445 configuration to confirm USB-C video output capability.
Can I use HDMI and USB-C displays simultaneously on the Dell Vostro 14 3445?
On configurations where the USB-C port supports DisplayPort Alt Mode, yes. Connect one monitor via HDMI and a second via USB-C adapter for a dual external monitor setup alongside the built-in display. The AMD Radeon 660M supports multiple simultaneous display outputs, though maximum resolution and refresh rate are shared across active displays.
Is the Dell Vostro 14 3445 good for office work?
Yes. The AMD Ryzen 5 7530U delivers strong performance for office productivity including Microsoft Office, email, video conferencing, and web browsing. The Vostro 14 3445 is positioned as a business-value laptop with essential business features at an accessible price point for small business and education deployments.
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