1. Dell computer power on button position and function
 The power on button of Dell computer is usually located on the top of the front or side of the chassis. You can press the button to start the computer. The function of the power on button is to transmit the current to the motherboard of the computer so that it can start working.
 The power on button of Dell computer is generally round or square, and the power symbol is usually marked on it. Before starting the computer, we need to ensure that the computer is connected to the power supply and the power switch is turned on.
 At the same time, in order to avoid frequent restart or shutdown of the computer due to accidental touch of the power on button, we recommend that the computer be placed on a stable desktop and away from children or pets.
 2. Precautions before startup
 Before starting up, we need to pay attention to the following aspects:
 1) Check the power cord connection: Make sure that the power cord is correctly connected to the computer and the power socket to avoid unstable power supply or failure to start.
 2) Troubleshooting hardware: If a hardware failure has occurred before, you can first troubleshoot it before starting the machine to avoid greater losses.
 3) Backing up important data: Before starting the computer, we recommend backing up important data to prevent accidental data loss when the computer starts.
 3. Operating steps during startup
 The specific operation steps of Dell computer startup are as follows:
 1) Press the power on button: find the power on button of Dell computer, press and hold the button, and wait for the computer to start.
 2) Enter BIOS setting: When Dell computer is powered on, it usually displays the prompt of pressing key to enter BIOS setting, such as "Press F2 to enter BIOS setup". We need to press the corresponding key (usually F2) to enter the BIOS setting interface.
 3) Select the boot device: In the BIOS setting interface, we can select the order of boot devices, such as starting from the hard disk first, starting from the CD-ROM drive, or starting from the USB drive. Select the appropriate startup device and save the settings according to your needs.
 4) Wait for the system to start: After completing the above operations, press the OK key to save the settings and exit the BIOS setting interface, and then wait for the operating system to start.
 4. Possible problems and solutions
 During startup, we may encounter the following problems:
 1) The computer cannot be started: if the computer does not respond after pressing the power on button, it may be caused by power failure, hardware failure, etc. At this time, we can check whether the power cord is connected normally, remove the hardware fault, or contact after-sales service for maintenance.
 2) Unable to enter BIOS setting: Sometimes pressing the corresponding key to enter the BIOS setting interface does not respond. This may be because the key is incorrect or there are other problems. We can try to press the correct key again and make sure that the key works properly.
 3) Incorrect boot device selection: After entering the BIOS setting interface, if the wrong boot device is selected, the system may not start normally. At this point, we can enter the BIOS setting interface again, select the correct boot device and save the settings.