Vex v5 brain stuck on this screen

I just got a new v5 kit from my teacher. I charged the battery and I connected it to the brain. The brain turned on but it immediately went to a black screen with these buttons: ADI loop back, ADI short test, motor/ efuse, and lcd/ button. You can see this in the picture I provided. I’m new to vex. Could someone please help me out. I want to get out of this screen and get to the Home Screen. I’ve tried pressing on the power button and the screen buttons but they all bring me back to the same screen.

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Your brain probably doesn’t have VexOS installed, if I had to guess (a similar issue exists with some nintendo switches). You might be able to fix this using the V5 firmware utility.


You should probably contact VEX support and have them replace that brain, it’s running production test code. The button on the brain is disabled, so the only way to stop that program would be to connect to VEXcode and use remote stop. If you do that, then you would need to go to the brain settings screen, “delete all programs” and “reset all settings”. However, as we don’t know if all tests were completed correctly by the factory, I would recommend you contact VEX support, explain the situation and have them replace it for you.


I have multiple new Brains with the same exact problem. I can stop the program but cannot get back to the Home Screen on the brain to reset the settings. I have a couple others that also boot into that but it goes away when I download a new program. This is quite annoying. Is this a quality control issue?

As stated earlier, just contact VEX support to have them swap out your brains.

Errors happen, just look at any VEX competitions where bots decide to go rogue.

I did but got an automated response. I replied and am waiting for a response from a human.

Phone calls work as well :slight_smile:

Errors are one thing. I have had 6 out of 18 of my brains have this issue. I was able to recover three of them on my own. Three have had to go back. For the cost of these things I should not be have an issue with a third of the devices my school purchased. Especially with all the issues we’ve had to deal with the Cortex. Not super impressed with vex microcontrollers and software.

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Called vex support, they provided me with this link :


to reset the V5 Brain. Worked first time on macOS Chrome. Eli said that you might need to connect at home if school software blocks the connection.

edit by mods: That’s actually not the link they are supposed to be giving out (it was a development link), so I removed it. There is an official link but we need customers with the issue to contact vex support to get hold of it so we can track the number of brains with this issue.

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