I'm not sure what amber lights might be flashing. The motion test will cause this so you can determine what sensitivity setting you should use in your modes and rules but otherwise shouldn't be on. Is the battery low? A slow amber flash denotes a low battery. If the battery is charged you may want to remove and readd the camera to see if that makes a difference.
Rolandlondon,
It sounds like you're referring to the IR LEDs illuminating when motion is detected. If there is insufficient lighting the camera will engage these LEDs to produce a night vision recording. You can optionally turn these IR LEDs off so that this does not happen, take a look here for more information: Are the infrared LEDs on Arlo cameras visible at night?
JamesC