HP EliteOne 800 G4 All-in-One Repair
If your HP EliteOne 800 G4 All-in-One will not start, shows no picture, runs hot or has become slow, we can diagnose and repair it at our Bermondsey workshop. The HP EliteOne 800 G4 All-in-One is a 2018 all-in-one PC with a 23.8-inch screen. Parts are matched to the exact chassis, so the model number matters when we quote.
- Model number
- 800 G4
- Released
- 2018
- Type
- All-in-one PC
- Screen
- 23.8-inch
- Storage
- M.2 SSD, plus a 2.5-inch bay on some configurations
- Memory
- SODIMM slots
What we repair on the HP EliteOne 800 G4 All-in-One
Screen replacement
A cracked or dark 23.8-inch display is replaced with a matching panel. Where the picture is there but very dim, we test the backlight and its driver before condemning the panel.
Price confirmed before work starts
Memory upgrade
Most configurations of the HP EliteOne 800 G4 All-in-One have SODIMM memory slots, so memory can be increased. We check what is fitted and the maximum the board supports.
Windows repair and reinstall
The HP EliteOne 800 G4 All-in-One 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.
SSD and storage upgrade
The HP EliteOne 800 G4 All-in-One has an M.2 slot and, on some configurations, a 2.5-inch bay. Machines that shipped with a hard drive are much faster once moved to an SSD.
Price confirmed before work starts
We also carry out motherboard repair, overheating and fan repair, virus removal on the HP EliteOne 800 G4 All-in-One, along with stand repair, no-picture and no-boot diagnosis, port repair, Wi-Fi and Bluetooth card replacement and data transfer to a new PC.
Notes from the workshop
- A black screen with the PC still running usually points to the panel or its backlight.
- HP all-in-ones use laptop-style components behind the display, which is removed to reach most parts.
Data recovery from the HP EliteOne 800 G4 All-in-One
The SSD in the HP EliteOne 800 G4 All-in-One can be removed and imaged on our own equipment, so files can usually be recovered even when the machine will not start.
Estimate the cost with our data recovery calculator, or read about recovering files after a ransomware attack.
Where the HP EliteOne 800 G4 All-in-One sits in the range
Its nearest relatives in the HP All-in-One, EliteOne and ProOne range are the older HP EliteOne 800 G3 All-in-One (2017) and the newer HP EliteOne 800 G5 All-in-One (2019).
Questions
Can the SSD or memory in the HP EliteOne 800 G4 All-in-One be upgraded?
The M.2 SSD can be replaced, and some configurations also have a 2.5-inch bay. Memory is in slots on most configurations and can be increased.
My HP EliteOne 800 G4 All-in-One 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.
Is a 2018 HP EliteOne 800 G4 All-in-One still worth repairing?
It depends on the fault. A battery, SSD or charging socket is usually worth doing. A major board repair on an older machine may cost more than the machine is worth, and if that is the case we will say so.
Where do I find the model number on my all-in-one PC?
The model is on a label on the back, side or underside of the machine. For this model, look for 800 G4.