Note: The following information applies to the devices IS310.2, IS320.1

If the display does not respond, or if the display only shows the boot logo, proceed as follows:

	Remove the battery from the device for at least 12 hours to discharge internal capacities.
	Restart the device.
	If the problem persists, send the device to our service centre. For quick order processing, submit a repair request. For detailed instructions, click here.