You connect an HDMI device to a DisplayPort monitor and get no signal, a black screen, or a display that never wakes. The problem usually comes down to adapter direction, missing USB power, the wrong monitor input, or a video mode the chain cannot sync. Start with the adapter itself, then move through power, input, refresh-rate, computer, and console fixes.
Use the correct HDMI to DisplayPort adapter
The most common cause is using a DisplayPort to HDMI adapter backward instead of an active HDMI to DisplayPort adapter.
Check both ends of the setup. If the laptop, desktop, console, camera, or streaming device has HDMI OUT and the monitor has DisplayPort IN, the adapter must be sold as HDMI to DisplayPort or HDMI to DP.
Replace any adapter labeled DisplayPort to HDMI, DP to HDMI, or passive. Passive conversion belongs to the opposite direction, from a DisplayPort source to an HDMI display, not from HDMI output to a DisplayPort monitor.
Buy an active HDMI to DisplayPort adapter for this setup. Direction is the first fix because a backward adapter gives the same blank-screen result as a dead cable.
Power the active adapter and reconnect cleanly
Use this order when the active adapter has a USB power lead.
- 1.Connect the adapter's USB power lead to a powered USB port or USB wall charger.
- 2.Connect the source device's HDMI OUT to the adapter's HDMI input.
- 3.Connect the adapter's DisplayPort output to the monitor's DisplayPort input.
- 4.Restart the source device.
- 5.Unplug the monitor from power briefly, plug it back in, then select DisplayPort or DP as the input.
Reseat the video chain
A stuck handshake leaves a good adapter showing no picture. Unplug the HDMI cable, DisplayPort cable, and adapter, then restart the source device before reconnecting anything.
Remove the monitor power briefly, then plug it back in. After the monitor wakes, reconnect the active adapter and wait for the display to lock onto the signal.
If this method fails, test a different HDMI cable, DisplayPort cable, adapter, monitor, source device, or source output port to isolate the failed part or incompatible port.
Set the monitor to DisplayPort
This method applies when the monitor has more than one input or its own DisplayPort version/input-mode setting. A monitor-side input mismatch looks exactly like a dead adapter.
Use the monitor's built-in buttons, joystick, or menu control. Choose the active input labeled DisplayPort, DP, Input, or Source.
Open the monitor's DisplayPort version or input setting when that option exists in the monitor menu. Set it according to the monitor manual, then reconnect the adapter.
Remove docks and splitters while testing
The most common cause after adapter problems is an inline device interrupting the video path.
Connect the source device, active HDMI to DisplayPort adapter, and monitor directly. Remove docks, splitters, capture devices, KVMs, AV receivers, sound bars, hubs, and other inline hardware.
After video returns, reconnect one device at a time. When the picture fails after one device is added back, that device or its settings are blocking the signal.
Lower the resolution or refresh rate
This fixes adapters and monitors that fail at the current video mode.
Check the adapter specs and source specs before using 4K or a high refresh rate.
For the Cable Matters 103099 HDMI to DisplayPort adapter, use an HDMI 2.0 source port for maximum 4K 60Hz support.
On Windows, open Start > Settings > System > Display > Advanced display.
Select the external display, then set Choose a refresh rate to a supported lower option such as 60 Hz or 30 Hz.
On PS5, open Settings > Screen and Video > Video Output.
Change the output resolution when the screen is visible.
On Xbox, press the Xbox button and open Profile & system > Settings > General > TV & display options.
Choose a compatible resolution and refresh rate.
When 4K fails on Xbox, open Video modes and uncheck Allow 4K.
Fix Windows display detection
Use these fixes when the adapter is correct and powered, but a Windows 11 or Windows 10 PC still sends output to the wrong screen or shows no external display.
Press Windows logo key + P and choose Duplicate, Extend, or Second screen only.
If the screen is blank, press Windows + P, tap P again to cycle modes, then press Enter.
Open Start > Settings > System > Display.
Select the external display, then adjust Display resolution, Scale, Display orientation, or the display arrangement area.
Choose Apply when prompted.
If the PC is stuck on a black screen, press Windows + Ctrl + Shift + B.
Wait for the beep or screen flicker, then check the monitor again.
For Windows 11 driver updates, open Start > Settings > Windows Update > Advanced options > Optional updates.
Select available driver updates, choose Download and install, then restart from Start > Shut down or sign out > Restart.
For GPU drivers, use NVIDIA App, AMD Auto-Detect and Install Driver Updates, or Intel Automatically update your drivers and software for the matching hardware.
Adjust Mac and Chromebook display settings
On a Mac, connect display power and video securely first. If the chain uses Thunderbolt or USB-C before HDMI or DisplayPort, the adapter must support DisplayPort Alt Mode, Thunderbolt 3, or Thunderbolt 4.
Bypass the hub or dock while testing, then open Apple menu > System Settings > Displays. Hold Option to show Detect Displays, then click Detect Displays.
Update macOS from Apple menu > System Settings > General > Software Update. Check the monitor maker's firmware process for third-party displays, and approve the accessory prompt on Apple silicon laptops when macOS asks.
On a Chromebook, select the time, then open Settings > Device > Displays. Select the monitor name and adjust Display and text size, Orientation, Resolution, or refresh rate; select Mirror built-in display for mirroring.
Repair console and managed device output
The most common cause on consoles is a resolution, HDR, 4K, or dock mode that the HDMI-to-DisplayPort chain cannot pass reliably.
On PS5 or PS4 with a blank screen, use Safe Mode. Turn off the console, hold the power button until the second beep, connect the controller by USB, then press the PS button.
On PS5, choose Change Video Output, then Change Resolution or Change HDCP Mode. On PS4, choose Change Resolution; PS4 Pro also lists Set HDCP Mode for 4K TVs without HDCP 2.2 support.
For Nintendo Switch, reset the dock connection in Nintendo's order. Power off the screen, disconnect all dock cables, unplug the AC adapter from the wall and dock or console for at least 30 seconds, connect the AC adapter to AC ADAPTER, connect HDMI from HDMI OUT, then dock the console.
For Switch, open System Settings > TV Output and set TV Resolution to Automatic, 480p, 720p, or 1080p. For Switch 2, use the NGN-01 AC adapter with the dock, use an Ultra High Speed HDMI Cable, then open System Settings > Display to adjust TV Resolution or HDR Output.
If this is a work or school Windows PC and driver updates never appear or device installs are blocked, contact IT. Managed Windows policies can block driver delivery or device installation, so the fix requires an administrator.
Frequently Asked Questions
Can I use a DisplayPort to HDMI cable backward?
No. For an HDMI source and a DisplayPort monitor, use an active HDMI-to-DisplayPort adapter. A DisplayPort-to-HDMI adapter is for the opposite direction.
Why does my HDMI-to-DisplayPort adapter have a USB cable?
That USB lead powers the active conversion. Connect it to a powered USB port or USB wall charger before testing the display.
Why does 4K fail but 1080p works?
The adapter, source port, cable, or monitor does not support that higher resolution and refresh-rate combination. Lower the refresh rate or resolution, then reconnect.
Should I update graphics drivers for this problem?
Yes, after the hardware path is correct. Use Windows Update optional driver updates or official NVIDIA, AMD, or Intel tools for the matching hardware.