Power and Volume Button Flex Cable
Huawei P40 Lite Power and Volume Button Flex Cable Replacement
- Fits
- Huawei P40 Lite
- Fixes
- Faulty side buttons
- Quality
- Brand new, OEM quality
- Fitting
- Professional install
Overview
What this part is
On the Huawei P40 Lite the power and volume keys press against a thin flex cable inside the frame. Drops, heavy use and liquid can break its contacts, so a key clicks but does nothing, or only works when pressed hard.
This flex cable replaces those contacts. The outer keys are reused from your phone. If the phone still does not respond after the flex is replaced, the fault may be in the main board.
Compatibility
Specifications and compatibility
- Part
- Power and Volume Button Flex Cable
- Compatible with
- Huawei P40 Lite
- Model numbers
- JNY-LX1
- Does not fit
- Huawei P40 Lite 5G, P40 Lite E, P40 or any other model
- Fixes
- Unresponsive, sticky or self-pressing power and volume keys
- Does not fix
- Missing outer keys, software or main board faults
- Quality
- Brand new, OEM-quality power and volume button flex cable. Tested before dispatch.
- Brand
- Unbranded, compatible with Huawei P40 Lite
- In the box
- 1 × power and volume button flex cable for Huawei P40 Lite.
- 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 key does not wake or lock the phone
- Volume keys do not change the volume
- A key only works when pressed hard
- The phone turns on or changes volume by itself
How to check your model
Open Settings › About phone. The model should read P40 Lite and the model number should be JNY-LX1.
The 4G P40 Lite model number starts JNY-. The P40 Lite 5G starts CDY- and the P40 Lite E starts ART-.
Professional installation
How a technician fits this part
- Power the phone off, remove the SIM tray and warm the back glass evenly to soften the adhesive.
- Lift the back glass with a thin pick, then remove the screws and cover plates over the part.
- Disconnect the battery connector before touching any other part.
- Unplug the old button flex, loosen its adhesive and lift it away from the frame.
- Fit the new flex so its contacts sit behind the keys, then plug it in.
- Reconnect the battery, test every key, then close with new adhesive.
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 Huawei P40 Lite?
Yes, if Settings › About phone shows P40 Lite with model number JNY-LX1. It does not fit the P40 Lite 5G.
Does it fit the Huawei P40 Lite 5G?
No. The P40 Lite 5G (CDY-NX9A) is a different phone with its own parts, even though the names are similar. Order the part listed for your exact model.
Is the side fingerprint sensor included?
No. This listing is for the power and volume button flex cable only. Compare it with the photos and your old part before fitting.
Is it made by Huawei?
No. It is a brand new, OEM-quality power and volume button flex cable made to fit the Huawei P40 Lite, and every part is tested before dispatch.
Should I fit it myself?
We recommend professional installation. The Huawei P40 Lite has a glued glass back that needs heat and care to open, and the battery must be disconnected before the new part is connected.
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.
Prepared by the Supreme Phone Parts team, Manchester. Last updated September 2026.