yellow question mark.esclamation point
red x on the device icon
It is a "!" is a yellow triangle
the Device Manager
check the device manager. click run, type devmgmt.msc
Red X means that particular device is disabled.
You will see a symbol with red color cross (X mark) on the device icon which indicates that device is not working or disabled.
A yellow exclamation mark in a triangle or a red cross in a circle indicate a problem. Displayed as a yellow triangle or question mark.
what is device manager and steps to see the detail of device manager
device manager
device manager
Device Manager
Check that the usb device is functional in the Device Manager, Some USB devices don't appear in Device Manager use the utility program that came bundled with the device to check for errors. No. Plug the device into another USB port. If it does not work after you have plugged it into all USB ports on the computer then you know that your device is not working.
Device manager