Use the hardware reset function of MacBook Pro to solve some faults

Use the hardware reset function of MacBook Pro to solve some faults. Today, a USB port of the newly purchased MacBook Pro is abnormal. The specific manifestation is that after connecting to the mobile hard drive, the hard drive lights shine but the Mac does not reflect any. Moreover, the iPhone cannot use this USB port for charging or data transmission. After Google, find the following steps to solve the problem: 1. Disable the computer. 2. SHIFT + CTRL + OPTION + POWER 10 seconds 3. press and hold OPTION + CMD + R + P + POWER, the Mac will continuously restart without entering the operating system, four times (three times officially said) and then release 4. after the USB port is properly started, the USB port becomes normal. Afterwards, I found the role of these key combinations in Apple's official documentation and found that the above steps are actually two different reset operations. SHIFT + CTRL + OPTION + POWER 10 seconds: reset the system management controller (SMC) www.2cto.com 1. Shut down the computer. 2. Connect the MagSafe power adapter to the power source and Mac (if not connected ). 3. On the internal keyboard, press Shift-Control-Option and power button at the same time. 4. Release all keys and power buttons at the same time. 5. Press the power button to open the computer. Note: When the SMC is reset, The LED on the MagSafe power adapter may be changed or temporarily disabled. You can reset the fan, power indicator, system performance, and video to solve some exceptions. OPTION + CMD + R + P + POWER: resetting NVRAM or PRAM Mac stores some settings in special memory areas, and even if you shut down these settings will not be lost (unless there is a battery problem ). On Intel-based Mac, the storage location is called NVRAM memory, while on PowerPC-based Mac, the storage location is called PRAM memory. 1. Turn off your computer. 2. Find the following buttons on the keyboard: Command, Option, P, and R. You need to press these keys at the same time in step 4. 3. Start the computer. 4. Hold down the Command-Option-P-R key. You must press this key pair before the gray screen appears. 5. Press and hold the above key until the computer restarts and you will hear it again. 6. Release these keys. Www.2cto.com stores a lot of hardware configurations in NVRAM and PRAM, and will not be lost because of shutdown. When a Mac encounters an exception in power supply and hardware, consider resetting it if it is not a trauma, for example: cannot be turned on, cannot wake up from sleep, cannot charge the battery, cannot see the AC adapter, connected to the AC adapter after electric shock, USB failure, etc. In addition, there are operational differences between the Power series and Intel series.
This article is from Phoenix.