Normally, the original LabQuest turns on in less than 90 seconds and displays the Meter screen (the screen that has the File and Sensors menus). If your original LabQuest fails to start, follow the links below to diagnose the issue.

Screen is black – power-button LED is OFF
This is most likely a power or battery-related issue.
See: LabQuest does not respond and the screen and power light are black.

Screen is black – power-button LED is FLASHING or won’t stay on
This is most likely a power or battery-related issue.
See: LabQuest does not respond and the screen and power light are black.

Screen is black – power-button LED is ON
This is most likely caused by the system shutting down because of a very low battery.
See: LabQuest blue power-button LED is on, but the screen is black.

Frozen on the logo screen
LabQuest software needs to be re-installed.
See:My original LabQuest is stuck on the LabQuest logo screen.

Shows white text on black screen, text may be looping
LabQuest software update failed and needs to be re-installed.
See:My original LabQuest is displaying white text on a black screen and will not boot.

Frozen on the teal Vernier screen
The LabQuest needs to be reset.
See:My original LabQuest is stuck on a plain screen displaying "Vernier" text.

Frozen on a white screen
The LabQuest needs to be reset or possible hardware issue.
See:My original LabQuest Screen is white and does not respond

Frozen on the “System is Rebooting” dialog
The LabQuest needs to be reset.
See:Original LabQuest gets stuck on the "System is rebooting" screen when trying to reboot.

See Also:
Original LabQuest Troubleshooting and FAQs (Full List)