(Reposted from Official Answers) Weird LED flashes on cortex and controller

[Simmons_2.0]

@bigzack1

Weird LED flashes on cortex and controller
So earlier in the season we had problems with my cortex, and in the end we had to upload a new software. Recently we were driving my bot to get ready for the next competition, when my team started experiencing difficulties creating and keeping a link between the cortex and controller. We have looked through the diagrams to try to dignose the problem, but we could not find anything that matched our problem. On the CORTEX we have no LED color for the robot, but we have a fresh battery in, solid green for VEXnet, and some times a flickering green for the game. On the CONTROLLER, it starts out like a normal start up where it searches for its other half. Than it connects for about a secon than the LEDs show green solid for controller, nothing for robot, solid red for VEXnet, and nothing for game. We are trying to figure out whats going on and what do we have to do to fix our problem.

Thanks,
SWAG
3281a

(reposted from here: Answered: Weird LED flashes on cortex and controller - OFFICIAL Tech Support - VEX Forum)

It sounds kind of like issues others have been experiencing on the forum.
To know for sure though, it would be helpful to have more information. I.E.:
[LIST]
*]What Cortex revision you have (printed on the bottom of your Cortex)
*]What programming language you are using (EasyC or ROBOTC)
*]What version (if RobotC, 2.xx or, 3.xx )
*]What mastercode version
*]What happens if you try other VEXnet keys
*]What happens if you try other joystick and cortex combinations
*]What happens if you downgrade to an earlier version of your programming software
[/LIST]

I hope we can help you, and get it figured out!

[jacko]

We had this issues (green light of death) with robotC 3.05, as soon as we went back to 3.04 it was fine. It was REALLY annoying though, so much time wasted reconnecting…