Forum Discussion

Silasoul's avatar
Silasoul
Tin Contributor
Aug 24, 2026

USB-C monitor connection fails intermittently

My USB-C monitor disconnects and reconnects at random intervals throughout the day, sometimes working perfectly for hours and other times flickering every few minutes without any pattern. I have tried different cables, updated all drivers, and tested the monitor on another laptop where it works fine, so I suspect a port or power delivery issue with my specific machine.

2 Replies

  • Benedictfo's avatar
    Benedictfo
    Brass Contributor
    Aug 24, 2026

    If your laptop has multiple USB-C ports, try connecting the monitor to a different port to see if the issue persists.

  • CameronTaylor1998's avatar
    CameronTaylor1998
    Brass Contributor
    Aug 24, 2026

    Since the monitor works normally on another laptop and you have already tried different cables, the problem is most likely on this laptop’s USB-C port, power delivery or controller side.

    Try these checks:

    1. Connect the laptop’s original charger separately while keeping the monitor connected through USB-C. If the connection becomes stable, USB-C Power Delivery negotiation or insufficient power is likely causing the resets.
    2. Test another video-capable USB-C port if the laptop has one. Also inspect the affected port for debris, looseness or damage.
    3. Open Control Panel > Power Options > Change plan settings > Change advanced power settings. Under USB settings, disable USB selective suspend for both battery and plugged-in use.
    4. Open Device Manager and expand Universal Serial Bus controllers. For each USB Root Hub that has a Power Management tab, clear Allow the computer to turn off this device to save power, then restart.
    5. Install the latest BIOS, chipset, graphics and USB-C/Thunderbolt controller updates from the laptop manufacturer’s support page. Device Manager may not provide all of these updates.
    6. Temporarily set the monitor to its native resolution at 60 Hz. If that stops the disconnects, the USB-C port may be having signal or bandwidth problems.

    If the issue continues while the laptop has separate power, especially if touching the connector triggers it, the USB-C port or its controller may need hardware service. Restore the power-saving settings if disabling them makes no difference.