ASUS ExpertBook B9 B9400 Repair
ASUS ExpertBook B9 B9400 repair in London: bring it to our workshop in Bermondsey or ask about courier collection, and we will confirm a price before any work starts. It is a 14-inch laptop from 2021. The SSD can be replaced but the memory is soldered, so storage is the only upgrade.
- Model number
- B9400
- Released
- 2021
- Type
- Laptop
- Screen
- 14-inch
- Storage
- M.2 SSD, replaceable
- Memory
- Soldered
Repairs we carry out on the ASUS ExpertBook B9 B9400
Screen replacement
Cracked, flickering or lined 14-inch screens are replaced with a matching panel. Where the picture comes and goes as the lid moves, we check the display cable and hinges first.
Price confirmed before work starts
SSD and storage upgrade
The ASUS ExpertBook B9 B9400 takes an M.2 SSD. We clone the existing drive to a larger one so Windows, programs and files carry over unchanged.
Price confirmed before work starts
Memory
Memory in the ASUS ExpertBook B9 B9400 is soldered and cannot be upgraded. It is worth knowing this before paying anyone for a memory upgrade.
Windows repair and reinstall
The ASUS ExpertBook B9 B9400 meets Microsoft's Windows 11 requirements in most configurations. We upgrade from Windows 10, which reached end of support in October 2025, or reinstall Windows 11 cleanly with your files kept.
Battery replacement
We replace the internal battery and check the charging circuit and adapter at the same time. On a 2021 machine a worn battery is the likely cause of short runtime, and we measure its capacity before recommending anything else.
Price confirmed before work starts
Charging port and power repair
Depending on the configuration this charges through a round socket, USB-C or both. We test the adapter, the port and the charging circuit to find which has failed.
We also carry out keyboard and trackpad repair, motherboard repair, liquid damage repair, overheating and fan repair, hinge and casing repair, virus removal on the ASUS ExpertBook B9 B9400, along with USB, HDMI and audio port repair, Wi-Fi and Bluetooth card replacement, webcam and speaker faults, BIOS password removal with proof of ownership and data transfer to a new machine.
What we see on the bench
- ExpertBook machines are business-focused, with a replaceable SSD on most models and memory that is part-soldered on many.
- Parts are matched to the full ASUS model code on the base label.
Data recovery from the ASUS ExpertBook B9 B9400
The SSD in the ASUS ExpertBook B9 B9400 can be removed and imaged on our own equipment, so files can usually be recovered even when the machine will not start. Recent Windows machines often have device encryption or BitLocker switched on. If so we will need the recovery key, which is normally saved in your Microsoft account.
Estimate the cost with our data recovery calculator, or read about recovering files after a ransomware attack.
Where the ASUS ExpertBook B9 B9400 sits in the range
Its nearest relatives in the ASUS ExpertBook and ProArt range are the older ASUS ExpertBook B9 B9450 (2020) and the newer ASUS ExpertBook B5 B5402 (2022). Memory differs: soldered on the ASUS ExpertBook B9 B9400, part soldered, one slot on most configurations on the ASUS ExpertBook B5 B5402.
Questions
Can the SSD or memory in the ASUS ExpertBook B9 B9400 be upgraded?
The SSD can be replaced with a larger M.2 drive. Memory is soldered and cannot be upgraded.
My ASUS ExpertBook B9 B9400 will not turn on. Is my data lost?
Usually not. The drive is separate from the fault in most cases, and we can remove it and copy your files even if the machine itself is not worth repairing.
How much does a ASUS ExpertBook B9 B9400 screen replacement cost?
Price confirmed before work starts. The exact figure depends on the part your machine needs, and we confirm it before any work starts.
Where do I find the model number on my laptop?
The base label shows the model code, for example UX425EA. The first part is the family and the letters after it are the variant. For this model, look for B9400.