Hello. The Maestro user’s guide documents what a blinking LED at startup means:
[quote]When the Maestro is reset in some other way than being initially powered up, the red and/or yellow LEDs blink four times to indicate the reset condition:
- Yellow off, red blinking: A brownout reset. This occurs when the Maestro’s 5 V line drops below about 3.0 V, usually due to low batteries or an inadequate power supply.[/quote]
This makes me think that you are having a power problem that only manifests itself when the servo draws a lot of current as it tries to move. If you are using batteries, please make sure they are freshly charged. Also, I bet you have your batteries connected to the Maestro’s VIN; it would help to disconnect VIN because then the Maestro’s processor can just be powered from USB.
If you continue to have trouble, please provide all the details about your setup, including pictures.