Actually, let me rethink that. Which red light are you talking about?
The LED that is next to the power button should be flashing green, not red. Are you talking about the red light on the Pi itself?
Just to be sure of this, you have a GoPiGo3 robot, right?
If so, can you keep pressing on the power button continuously and see if that triggers the boot procedure of the Raspberry Pi? Keep it pressed for say … 10 seconds.
And also, what OS are you using? I suppose it’s DexterOS, right? In which case, can you tell us the version of it?
We have reasons to suspect that the Raspberry Pi in your robot is malfunctioned. Would it be possible for you to swap the Raspberry Pi with another one before we move on to the next step?
Also, since we’re suspecting the Raspberry Pi, do you think you could also place the microSD card of that robot into another one that currently works and see if it boots up?
Thank you and we’re hoping to see this fixed ASAP for you!