Troubleshooting - Dell MH3021P User Manual

Troubleshooting

Problems
MH3021P is not working on the
USB-A port on your computer
Multiple displays are not
working
Not able to utilize all the USB
ports at the same time when
MH3021P is connected to
notebook without external
power source
Unable to read and write to an
external SSD/HDD and optical
(CD/DVD/Blu-ray) drive when
connected to MH3021P
Power Surge message pops up
"Unknown USB Device needs
more power than the port can
supply" when connecting a
peripheral to the MH3021P
Resolution on the monitor is
lower than 4K 60 Hz when
connected to the HDMI or Type-
C port of MH3021P
MH3021P is not charging your
computer through the USB-C
port
I see a yellow bang icon on
the battery status icon
No video on the monitor
attached to MH3021P
Video / Audio performance
issues
Update your system's BIOS and
MH3021P rmware
Dell Display Manager (DDM) is
not working
Possible solutions
MH3021P is compatible only with the USB-C port on your computer. Thunderbolt port or USB-C
(DisplayPort Alt Mode) port.
The MH3021P supports single display out. You can only connect a peripheral to the HDMI port, or
USB-C monitor at a time.
If you connect MH3021P to a Thunderbolt or 15 W USB-C (DisplayPort Alt Mode) port on your
computer, you can use one video output, speakerphone, and the low powered USB devices like:
mice, presentation clicker or RF dongle, and possibly the external hard disk drive.
If you connect MH3021P to a 7.5 W USB-C (DisplayPort Alt Mode) port on your computer, you
can use one video out along with low powered devices like presentation clicker/RF dongle.
• Some external SSD/HDD/Optical drives require higher power than what your MH3021P can
support.
• It is recommended that you connect external SSD/HDD/Optical drive to your computer directly.
• The peripheral you connected to MH3021P needs more power.
Disconnect other peripherals connected to MH3021P.
For high-power consumption peripherals, it is recommended to connect the peripheral to your
computer directly.
• All devices that are connected to the USB-A / USB-C port of MH3021P will be disconnected
automatically when the power surge message pops up. You can remove the last connected USB
device.
• Check to ensure the monitor is capable to support 4K60Hz.
• The 4K resolution at 60 Hz is supported on computers that have DisplayPort 1.3 or later (HBR3)
with a display that is capable of 4K resolution at 60 Hz. On computers that
support below DisplayPort 1.3, the maximum resolution supported is 4K at 30 Hz.
• MH3021P supports 90W max Power Delivery. The minimal power requirement for charging is
platform dependent.
• MH3021P reserves 15W, so your system gets 15W less from the power source. You may observe
a slow charging message/icon because of this.
• Recommended to use higher rating power adapter for optimal charging.
• MH3021P only support single monitor.
• Check the video connection cables.
• Disconnect the peripheral from MH3021P, wait for 10 seconds then connect the peripheral.
Check/update system BIOS, graphic driver and audio driver for newer version.
Check/update system Thunderbolt rmware and driver for newer version.
• Please update your system's BIOS, graphics and drivers from
https://www.dell.com/support/drivers
• Please update you MH3021P FW from
https://www.dell.com/support/drivers
Need to connect MH3021P to your computer before update FW.
Check/Update system BIOS / Graphic driver andinstall Dell Display Manager (DDM) Monitor
application.
https://www.dell.com/support/home/drivers/driversdetails/?driverid=6WGWY
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