MacBook Pro 14 inches Charger Communication Repairs

In this video, we’re working on a 14-inch MacBook Pro with the M1 chip. The unit fails to complete the charger communication phase — it powers on when connected to a charger, but the system shows no indication of charging. There’s no battery icon or charging symbol, and the battery itself is neither detected nor charging. According to the previous repair shop’s diagnosis, the issue appeared to be battery-related. They replaced the battery, but the problem persisted, after which the device was sent to us. During this repair, I walk through the entire troubleshooting process step-by-step, explaining how to approach a case like this from start to finish. If you have any questions or need further clarification, feel free to leave a comment below. I’ll do my best to respond.