Macbook can't be charged.

Check the power supply. If there is nothing wrong with the patch panel, it may be a wiring problem. Check the incoming and outgoing terminals of the line with a stylus to see if the stylus will light up. If not, it is a circuit problem. If it's on, it's a computer power problem. In fact, you tried to connect your cable to someone else's mac. If others do the same, it's a circuit problem.

If someone else lights up, it's the power of your computer. If you have an old pro (with CD-ROM drive), you can take it apart and have a look at your contacts. Try the electroscope. If the new pro(retina) power supply can't be removed, go for after-sales maintenance. Its hot melt adhesive can't be disassembled at will.

Extended data:

Power adapter is a power conversion device for small portable electronic equipment and electronic appliances, which generally consists of shell, transformer, inductor, capacitor, control ic, PCB board and other components. Its working principle is to convert AC input into DC output. According to the connection mode, it can be divided into plug-in wall type and desktop type. Widely used in security cameras, set-top boxes, routers, light bars, massagers and other equipment.

Switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, liquid crystal displays, LED lamps, communication equipment, audio-visual products, security, computer cases, digital products, instrumentation and other fields.

References:

Power adapter _ Baidu Encyclopedia