Dell P2222H, Service Manual

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6. Trouble Shooting Instructions
Product-specific problems
Specific
Symptoms Possible Solutions
Screen image is too
small • Check the Aspect Ratio setting in the Display settings
OSD.
• Reset the monitor to Factory Settings ( Factory Reset ).
Cannot adjust the
monitor with the
joystick • Turn Off the monitor, unplug the power cord, plug it back,
and then turn On the monitor.
• Check whether the OSD menu is locked. If yes, move
and hold the joystick up/down/left/right for 4 seconds to
unlock (for more information, see
Menu and Power button
lock ).
No Input Signal
when user controls
are pressed • Check the signal source. Ensure the computer is not in
Standby Mode by moving the mouse or pressing any key
on the keyboard.
• Check if the video cable is plugged in properly. Disconnect
and reconnect the video cable if necessary.
• Reset the computer or video player.
The picture does
not fill the entire
screen • Due to different video formats (aspect ratio) of DVDs, the
monitor may display in full screen.
• Run the built-in diagnostics.
Universal Serial Bus (USB) specific problems
Specific
Symptoms Possible Solutions
USB interface is
not working • Check that your monitor is turned On.
• Reconnect the upstream cable to your computer.
• Reconnect the USB peripherals (downstream connector).
• Turn off the monitor and turn it on again.
• Reboot the computer.
• Certain USB devices such as portable hard drive require
higher power source; connect the drive to the computer
directly.
SuperSpeed USB
5 Gbps (USB 3.2
Gen1) interface is
slow • Check that your computer is SuperSpeed USB 5 Gbps
(USB 3.2 Gen1)-compatible.
• Some computers have USB 3.2, USB 2.0, and USB 1.1
ports. Ensure that the correct USB port is used.
• Reconnect the upstream cable to your computer.
• Reconnect the USB peripherals (downstream connector).
• Reboot the computer.
Wireless USB
peripherals stop
working when a
USB 3.2 device is
plugged in • Increase the distance between the USB 3.2 peripherals
and the wireless USB receiver.
• Position your wireless USB receiver as close as possible to
the wireless USB peripherals.
• Use a USB-extender cable to position the wireless USB
receiver as far away as possible from the USB 3.2 port.