If your iPhone shows vertical or horizontal lines, or half the screen is dead, frozen or not responding to touch, the display assembly has failed — and a replacement screen (from £18.66) is the fix. These are hardware faults, so software resets won't cure them, but it's worth a 30-second check first.
Quick check before you replace
- Force restart (Volume Up, Volume Down, hold Side) to rule out a one-off freeze.
- Update iOS to be thorough.
- If the lines or dead half remain — or appeared after a drop — it's the display.
What each symptom means
| Symptom | Cause | Fix |
|---|---|---|
| Vertical/horizontal lines | Damaged panel or loose display connector | Reseat or replace screen |
| Half the screen black or frozen | Failed panel section | Replacement screen |
| Half the screen won't respond to touch | Digitiser fault on one side | Replacement screen |
| Lines that change with pressure/bending | Loose or damaged display flex | Reseat, else replace |
Direct answer: lines and a dead or unresponsive half both point to the display assembly or its connector. If a recent repair caused it, reseating the display cable may help; otherwise the screen needs replacing.
The replacement screen you need
Fit a new display matched to your model. Screens start at £18.66 (iPhone 15 incell), with OLED options such as the iPhone 15 Pro hard-OLED at £54.27. Pick your grade with the iPhone screen grades guide.
Why buy your iPhone screen from Supreme Phone Parts?
- UK stock, dispatched from the UK — no long overseas waits.
- eBay Top Rated seller — trusted by UK repairers and repair shops.
- Trade & bulk pricing available for repair businesses.
Frequently asked questions
Why does my iPhone have lines on the screen?
Usually a damaged display panel or a loose display connector, most often after a drop. A replacement screen (or reseating the cable after a repair) fixes it.
Why is half my iPhone screen not working?
Part of the display or digitiser has failed, so half the screen goes black, freezes or stops responding. A replacement screen resolves it.
How much is an iPhone screen replacement?
From £18.66 for an incell display; OLED costs more. A repair shop adds labour.
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