In mobile device repair, diagnosing and resolving charging issues is essential. When the battery voltage is low, it is necessary to boost it using a laboratory power supply with the same voltage and amperage as the battery. Connecting the flex that links the motherboard and sub-motherboard, as well as the battery connector, enables the device to receive charge correctly. A repair like this can be completed in less than half an hour, making it a valuable skill for technicians.

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Two critical voltages on the motherboard are the Boost input voltage and the Buck output voltage. Mastering these two voltages is crucial to identifying other essential voltages and making a good diagnosis. Visual inspection of the motherboard can help detect components with cracks, details, and possible signs of humidity, providing valuable information for making a conclusion.

For Samsung devices, a consumption range of 140-210 mAh may indicate problems with memory and CPU, while for Xiaomi, Realme, Oppo, Huawei, and Pocophone devices, consumption between 50-80 mAh may also suggest memory and CPU issues. If a device does not turn on and shows an unknown driver when connected to a computer, this could also point to a problem with the device's memory or CPU. However, if the computer recognizes the device correctly, such as a Samsung S10 driver, then the CPU and memory can be ruled out as the issue.

In summary, mobile device repair professionals need to understand how to diagnose and resolve charging problems, boost low battery voltage, and identify critical voltages on the motherboard. Conducting visual inspections of the motherboard and understanding consumption ranges and device behavior when connected to a computer can help make accurate diagnoses. Mastering these skills is essential for efficient and effective mobile device repair, offering a valuable service to clients and a rewarding career for technicians.

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