B400A - Laptop ASUS - Free user manual and instructions
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| Product Type | Notebook / Laptop |
| Brand | ASUS |
| Model | B400A |
| Display Size | 14 inches |
| Processor | Intel Core i5 dual-core |
| RAM | 4 GB DDR3 (expandable to 8 GB) |
| Storage | 500 GB SATA hard drive |
| Operating System | Windows 7 Professional |
| Dimensions (W x D x H) | 13.3 x 9.4 x 0.8 inches |
| Weight | 3.9 lbs (1.77 kg) |
| Power Supply | 65 W AC adapter, 6-cell Li-ion battery |
| Connectivity | Wi-Fi 802.11 b/g/n, Bluetooth 4.0, Gigabit Ethernet |
| Ports | USB 3.0, USB 2.0, HDMI, VGA, SD card reader |
| Security Features | TPM 1.2 chip, fingerprint reader, Kensington lock slot |
| Keyboard | Chiclet keyboard with numeric keypad |
| Maintenance | Clean with dry soft cloth; periodic cooling fan cleaning |
| Spare Parts | Battery, adapter, keyboard, and hard drive available from ASUS |
| Repairability | Easy access to RAM and storage compartments |
Frequently Asked Questions - B400A ASUS
How do I enter the BIOS on my ASUS B400A?
Restart your laptop and press F2 repeatedly as soon as the ASUS logo appears. On some models, you may need to press Del or Esc. The BIOS allows you to change boot order, enable virtualisation, and configure hardware settings.
How can I upgrade the RAM?
Turn off the laptop and remove the battery. Unscrew the memory compartment cover on the underside. The B400A has two SO-DIMM slots, with one occupied by 2 GB and the other empty for up to 8 GB. Insert a compatible DDR3 module at a 45-degree angle and press down.
How should I clean my laptop screen?
Use a microfiber cloth slightly dampened with water or a 50/50 mix of isopropyl alcohol and water. Avoid paper towels and harsh chemicals. Never spray directly on the screen; apply to the cloth first and wipe gently.
What is the optimal way to maintain battery life?
Keep the battery between 20% and 80% for regular use. Avoid exposing the laptop to high temperatures. Use ASUS Battery Health Charging in the BIOS or software to limit charge to 80% if always plugged in. Calibrate the battery monthly by fully discharging and recharging.
How do I perform a factory reset?
Save your data, then restart. Press F9 during boot to enter the recovery partition. Choose Recover Windows to Factory Defaults and follow on-screen instructions. This will restore the original Windows installation and remove all personal files.
Does the ASUS B400A support dual monitors?
Yes, the laptop has HDMI and VGA outputs. Connect one external monitor to each port and use Windows display settings to extend or mirror the desktop. The integrated graphics support up to two external displays in addition to the internal screen.
How can I replace the hard drive?
Turn off the laptop and remove the battery. Unscrew the hard drive bay cover. Slide the drive out of its connector, then insert a new 2.5-inch SATA drive. Reinstall the cover and power on. You may need to partition and format the new drive.
Is the fingerprint reader supported in Windows 10?
Yes, but you may need to install the ASUS fingerprint driver for the B400A. After installation, set up a PIN in Windows Hello and add your fingerprint under Sign-in options. If the reader is not recognized, update the BIOS as well.
How do I troubleshoot overheating issues?
First, clean the cooling vents with compressed air and ensure the fan is running. Update the BIOS and chipset drivers. If overheating persists, replace the thermal paste on the CPU. Use a cooling pad and restrict resource-heavy tasks.
Can I charge the battery via USB-C?
No, the B400A was released before USB-C PD became common and only has a dedicated DC-in port for the included 65 W adapter. Use only the original charger to avoid damage; third-party chargers may not provide the correct voltage.
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USER MANUAL B400A ASUS
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Product information
Brand : ASUS
Model : B400A
Category : Laptop