Just replaced the battery in my SE Angelus and now when I turn the tuner on, the red battery light blinks briefly and the LED window up/down adjust lights alternate but no letter scale is displayed. Plugged the guitar into my amp and the pickup is not working either. Verified that the battery is installed properly. When I turn the tuner on I can hear a slight pop thru the amp so it appears to be getting power. Wish there was a manual somewhere for this lol.