Power and Volume Button Flex Cable
Honor 400 Power and Volume Button Flex Cable Replacement
- Fits
- Honor 400
- Fixes
- Faulty side buttons
- Quality
- Brand new, OEM quality
- Fitting
- Professional install
Overview
What this part is
The power and volume buttons on the Honor 400 press onto small switches on a thin flex cable inside the frame. After a drop, liquid or years of use those switches can fail, so a button stops clicking or stops responding.
This cable replaces the switches for the power and volume buttons in one part. If the metal buttons themselves are bent or missing, those are separate parts.
Compatibility
Specifications and compatibility
- Part
- Power and Volume Button Flex Cable
- Compatible with
- Honor 400
- Model numbers
- Check Settings › About phone
- Does not fit
- Honor 400 Pro, Honor 400 Lite, Honor 400 Smart or any other model
- Fixes
- Power or volume buttons that do not respond, stick, or work only now and then
- Does not fix
- Bent or missing outer buttons, charging, screen or motherboard faults
- Quality
- Brand new, OEM-quality power and volume button flex cable. Tested before dispatch.
- Brand
- Unbranded, compatible with Honor 400
- In the box
- 1 × power and volume button flex cable
- Colour
- As shown in the photos
- Installation
- Professional installation recommended
- Supplied by
- Supreme Phone Parts Ltd, Manchester, UK
Before you order
Is this the right part?
Signs it needs replacing
- The power button does nothing when pressed
- Volume up or down does not respond
- A button feels flat, with no click
- The phone restarts or changes volume by itself
How to check your model
Open Settings › About phone. The model name should read Honor 400, not Honor 400 Pro. The model code is also shown there and on the phone's box.
The Honor 400 (2025) sits below the Honor 400 Pro. Other phones in the range, such as the 400 Lite and 400 Smart, use different parts.
Professional installation
How a technician fits this part
- Power the Honor 400 off and remove the SIM tray.
- Remove the back cover carefully, using gentle heat if it is glued.
- Disconnect the battery connector first.
- Unclip and lift out the old button flex cable.
- Fit the new cable in place, reconnect it and test every button before closing.
- Refit the back cover with new adhesive and do a final check.
Check that the part matches the device before fitting it or removing any adhesive backing. Once a part has been fitted, it cannot be returned for a change of mind. Faulty parts are always covered.
FAQ
Frequently asked questions
Will this fit my Honor 400?
Yes, if Settings › About phone shows Honor 400. It is made for the Honor 400 only.
Does it fit the Honor 400 Pro?
No. The Honor 400 Pro is a different model and needs its own power and volume button flex cable.
Will this fix a button that is physically missing?
No. This cable holds the switches under the buttons. A missing or bent outer button is a separate part.
Is it made by Honor?
No. It is a brand new, OEM-quality power and volume button flex cable made to fit the Honor 400, and every part is tested before dispatch.
Should I fit it myself?
We recommend professional installation. Opening the Honor 400 needs heat, the right tools and new adhesive, and the battery must be disconnected safely.
How quickly will it arrive?
Orders placed before 4pm on a working day are dispatched the same day from Manchester by Royal Mail Tracked. Delivery is free on UK orders over £5. You can also collect from our shop at 33 Moulton Street, Manchester M8 8FQ. Returns are accepted within 30 days from receipt.
Prepared by the Supreme Phone Parts team, Manchester. Last updated September 2026.