Press and hold the power button for 2-3 seconds. Please be sure to use the manufacturer's AC Adapter. Try replacing batteries, if using battery operating mode. Request a Return Goods Authorization (RGA) - RGA Form
Confirm your have a functional probe to test with transceiver. Confirm your Doppler Transceiver is functioning properly as well. Check crystal at probe tip for visible damage. Please refer to IFU for more information or contact Mizuho America's Customer Service at firstname.lastname@example.org or call 888-699-2547 for more assitance.
Mizuho America's standard warranty is one year from the date of purchase. To confirm purchase date contact Customer Service at email@example.com. Please have the following information ready when you contact us: item number(s) and/or serial number and lot number.
Yes, you can send the item in for an evaluation to determine what repair is needed and/or if items need to be replaced. Please contact Mizuho America's Customer Service at firstname.lastname@example.org or call 888-699-2547 for help with arranging an evaluation.