Lenovo B5400 Hardware Maintenance Manual
![Lenovo B5400 Laptop manual cover](/images/kraFffNuhsaZddTCIoSAkEUs/thumbs/thumb175x175.webp)
To perform a factory reset on your Lenovo B5400, restart the laptop and press the F11 key during boot-up to access the recovery environment. Follow the on-screen instructions to reset your laptop to its factory settings. Ensure you backup any important data as this process will erase all data on the device.
First, ensure the laptop is charged by connecting it to a power source. If it still won't turn on, perform a hard reset by removing the battery and power adapter, then press and hold the power button for 30 seconds. Reconnect the power and try again. If the issue persists, consult a professional technician.
To improve performance, consider upgrading the RAM and replacing the HDD with an SSD. Also, regularly clean up unnecessary files and programs, and ensure your operating system and drivers are up to date. Running disk cleanup and defragmentation can also help.
Visit the Lenovo support website and download the latest BIOS update for the B5400. Follow the provided instructions carefully, usually involving running the downloaded executable file and following the on-screen prompts. Ensure your laptop is plugged into a power source during this process.
Click on the network icon in the taskbar, select your wireless network, and click 'Connect'. Enter the network security key if prompted. Ensure your Wi-Fi is turned on and the wireless drivers are properly installed.
Check if the touchpad is disabled by pressing the function key combination (usually Fn + F6 or similar) to enable it. Update the touchpad driver through Device Manager and ensure no external devices are interfering with the touchpad functionality.
Turn off the laptop and unplug all cords. Slide the battery release latch to unlock and remove the old battery. Insert the new battery into the slot, ensuring it clicks into place. Lock it by sliding the latch back into position.
Turn off the laptop, disconnect all cables, and remove the battery. Use a can of compressed air to blow out dust from the fan vents. For a thorough cleaning, disassemble the laptop and clean the fan directly, being careful not to damage any components.
Ensure the fan vents are not blocked and clean them regularly. Use a cooling pad to help dissipate heat. Check for any CPU-intensive processes and close unnecessary applications. Update the BIOS and drivers to the latest versions.
Lower the screen brightness, turn off Wi-Fi and Bluetooth when not in use, and use power-saving modes. Avoid running resource-heavy applications on battery power, and ensure the battery is properly calibrated by occasionally letting it drain completely before recharging.