Need help.

[XeniaShabanova]

I am programming an RC car using Pybricks for Spike Prime. Everything worked fine for a couple of days. Then I tried adding a button to switch the headlights on (in a copy of my program). After that, when starting any program, the car immediately begins to spin one motor endlessly and does not allow the remote to connect.

I assumed it was just a coding error, so I uploaded my previous program that was 100% functional — but the problem remained. The motor keeps spinning and the remote cannot connect.

I tried the following, but nothing helped:

-Reinstalling the Pybricks app

-Uploading a previously working program

-Creating and running a brand-new minimal test program

Even the simplest new program does not run correctly. It looks like a global/system-wide failure of the hub.

How can I fully reset the hub and clear this error? The day after tomorrow my 9-year-old son is participating in an exhibition, and he is very proud of his project. Our project is at risk. = (

[laurensvalk]

Is it possible that the motor intended for steering is plugged into the port for driving, and vice versa?

That would explain all of the above symptoms, even if it isn't too obvious at a glance.

It will spin the steering motor to find the endpoints. But if it's driving a wheel, there isn't an endpoint so it just keeps going.

In short, check the cables carefully :)

[XeniaShabanova]

Thank you for being willing to help. We didn’t rearrange any motor wires; we only tried to add a function to turn the headlights on and off. We didn’t change anything in the physical build. But just in case, I double-checked all the connected motors again. Everything is connected correctly, yet even the program that used to work perfectly no longer works.

[laurensvalk]

To confirm that the motors are working, you could try these steps:

• Make a copy of your program as a backup
• Delete the car blocks
• Add three motor blocks to drive 90 degrees for each of the motor.
• Observe if they move in the same order that you put them in.