The control of the acrobee consists of the Flight Controller (FC), the Receiver that is built into the FC and the Transmitter (TX). In order for this system to work correctly all parts of the system must be working.
Example of Normal operation
Here is a video showing normal working condition. Please note each flying environment will yield different results but this shows a baseline.
Description of Problem
In this section we will take a look at losing control of the acrobee and having it fall out of the sky.
This can be caused by a missing or damaged FC antenna, a damaged TX, or physical damage to a part.
Some solutions to this are verifying the antenna is on the FC and about 31mm in length. Having either the internal antenna or external selection bridged.
If you have no red lights at all or if none of the above fixed your issue please submit a ticket with your order number and a video of the FC powered on.