If the screen of a Galaxy S23+ misses touches, taps by itself or shows a colored line, first separate a software fault from a display fault. Remove the case and any protector, wipe the screen dry, restart and test in Safe mode. A vertical green, pink or white line that appears with no drop and no water is a display connection fault that software cannot clear, and several S23 owners reported lines after One UI 8.5. Samsung's US screen-only repair price for the S23+ is $194.
Differential
Likely causes of “Samsung Galaxy S23+ screen or touch input is not working correctly”, and how to tell them apart
- 1
A case or protector pressing on the edges
What separates it Ghost touches along the border
How to confirm Remove both and test
- 2
A wet or greasy screen
What separates it Erratic taps after rain or washing hands
How to confirm Dry the screen and wipe it with a clean cloth
- 3
A software glitch after an update
What separates it Touch fails in one app or after waking
How to confirm Restart, update, then test in Safe mode
- 4
Touch sensitivity setting
What separates it A thick protector blocks touches
How to confirm Settings, Display, Touch sensitivity
- 5
A display fault
What separates it A colored line or a dead strip that stays
How to confirm A Samsung display repair is needed
- 6
Water under the glass or a hard knock
What separates it A line, ink spot or dead strip appears after a drop or after the phone was wet
How to confirm Do not press on it; back up the phone and take it to Samsung, because liquid damage and impact damage are repaired differently
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether touch is dead, ghosting or a line
- Where on the screen
- Case and protector
- The One UI version and patch date
Try in this order
0 of 6 completedStrip the phone
ReversibleRemove the case and protector.
Dry and wipe
ReversibleUse a dry, clean cloth.
Restart
ReversibleHold the side key and volume down and tap Restart.
Run the touch test
ReversibleSamsung Members, Get help, Phone diagnostics, Touch screen.
Test in Safe mode
ReversibleHold Power off and tap Safe mode.
Back up and book service
ReversibleUse Smart Switch or the cloud, then book a Samsung repair.
Model-specific
What is true of this model and not of its siblings
- What the S23+ screen is
- A 6.6-inch Dynamic AMOLED 2X panel at up to 120 Hz under Gorilla Glass Victus 2, so a colored line or a dead patch is a panel or connector fault rather than a software one.
- Reported after updates
- S23 owners reported green, pink or white vertical lines after One UI 8.5 with no drop or water; PhoneArena advised caution before installing it on a phone that is working well.
- How to photograph a display fault for Samsung
- Take a screenshot with the fault visible, then a photo of the same screen with a second camera. If the line is in the photo but not the screenshot it is in the panel, which is the evidence a repair agent wants.
- Samsung's repair prices for the S23+
- Samsung's US list shows $194 for a screen-only repair and $249 for the screen module with a new battery; a line that appears with no impact is a fault that Samsung can examine.
Stop boundary
When this stops being a self-service repair
- !A line that stays in Safe mode needs a display repair, priced at $194 screen-only on Samsung's US list
- !A cracked screen should be repaired promptly
- !Back up before the repair
Evidence ledger
Sources behind this answer
Samsung's touchscreen checklist.
Samsung's suggested US screen and screen module repair prices by model.
Per-model battery, charging, chip, display and storage for the S23, S23+ and S23 Ultra.
Exact questions
Common questions
What causes a green line on the S23+?+
A failing display connection; owners reported lines after updates with no damage.
Does Samsung repair it?+
Yes. The US list shows $194 for a screen-only repair.
Can a reset remove the line?+
Not if the cause is hardware.
Is it covered by warranty?+
Ask Samsung; coverage depends on the age of the phone.
Should I install One UI 8.5 on my S23+?+
If the phone works well there is no urgency. Owners reported display lines after that update on S23 phones, so back up first and be ready to book a repair.
What does a screen-only repair include?+
A new display assembly. Samsung's US list shows $194 for the S23+ screen alone and $249 for the screen module that also brings a new battery.
Will a screen replacement erase my data?+
A display swap does not touch your storage, but back up first because a technician may need to reset the phone.
Why do ghost touches stop when I unplug the S23+?+
A cheap charger can add noise that the touch layer reads as taps; a Samsung adapter and cable usually remove it.