Hello, Herman Uscategui.
Welcome to Microsoft Community!
After reading your description, I understand that your Surface Book is currently not booting up properly. Also, the detach button light is lit in red.
I believe you have referred to the content in the link below:
Surface won’t turn on or start - Microsoft Support
The main reason why you can't separate the screen from the keyboard is that both the keyboard and the screen have less than 10% battery. Therefore, you will see the red light on.
Fix problems detaching or attaching your Surface Book keyboard - Microsoft Support
So, at this point I would like to confirm with you that your Surface Book 1 will continue to charge. It is possible that this could be a low battery causing it to not boot up and you could try booting it up with access to a power source.
If you successfully boot up your Surface Book while plugged into a power source, try manually updating its drivers and firmware to troubleshoot potential driver issues and maintain device performance:
Download Surface Book Drivers and Firmware from Official Microsoft Download Center
At the same time, it is worth noting that the Surface Book, the first generation of the Book series, has been discontinued worldwide. Microsoft no longer provides out-of-warranty repairs.
Therefore, it may be difficult to get hardware-level support. However, I will give you as much advice as possible based on the follow-up situation.
I look forward to your progress.
Best Regards.
Leo.L - Microsoft Community Support Specialist