When the display is flashing the unit will automatically block any buttons indicating that the battery needs to be changed. Turn the device off and change the battery. Once you have new a new battery, turn the TENS 504 on and the display and buttons will function normally.
The display on my TENS 504 is flashing: Print
Modified on: Tue, 28 Jul, 2015 at 2:11 PM
Did you find it helpful? Yes No
Send feedbackSorry we couldn't be helpful. Help us improve this article with your feedback.