LabQuest Screen is white, does not respond

First, try performing a hard reset by holding down the hard reset button for 5-10 seconds.
TIL 1777: How do I reboot or reset a LabQuest?

After the hard reset, you will see the blue light around the power button appear, while the screen is dark.

If the white screen reappears, please contact Vernier Technical Support at 888.837.6437 to set up a repair.