Screen Grades & Warranty
This guide covers the part of a screen repair that happens before and after the fitting: what grade you are buying, how to check it, and what your warranty should actually cover.
Three routes, and you only need one of them
Take the route that matches the decision in front of you.
Know the grades
Take this route before buying stock or quoting. The words shops use for grades do not mean the same thing across suppliers, and that gap is where margin and complaints both come from.
Test before you seal
Take this route at the bench. Almost every screen warranty claim is decided by checks that either happened before the device was closed or did not happen at all.
Handle warnings and claims
Take this route when the device reports a part, or when a customer returns one. Both are policy questions as much as technical ones.
Where warranty claims actually come from
Most claims are not a bad part. They are a grade that was not explained, or a check that was skipped before the device closed.
The grade conversation
When a customer is told "a new screen" they expect an original. If the part fitted is an aftermarket or refurbished panel, the difference will be noticed eventually: brightness, colour temperature, touch feel or the absence of features such as True Tone. Explaining the grade in the quote, in the customer’s language, removes most of the argument before it starts, and it is also what lets you offer two prices honestly rather than one price and a hope.
The checks that decide the claim
A screen tested before it is sealed is a screen you can defend later. Touch across the whole surface, brightness at both ends of the range, proximity and camera behaviour, and a look at the flex for marks all take a few minutes and catch the faults that would otherwise appear a week later. Shops with a low claim rate are not fitting better parts; they are running the same checks every time and recording them.
What actually decides a warranty claim — four things
Four variables, and only the last one is really about the part.
What the customer was told
A grade explained in the quote prevents most disputes. "A new screen" means genuine to a customer, whatever it means on the trade list.
What was checked before sealing
Touch, brightness, proximity and flex marks. These are the checks that decide whether a fault is visible now or after collection.
Pairing and transfer work
IC transfer and genuine-display warnings are part of the repair where they apply, and doing them badly creates a fault of the shop’s own making.
Supplier consistency
The same grade name from two suppliers is not the same part. Batch consistency is what makes a warranty policy affordable rather than painful.
Where to go from here
Grading connects the buying decision to the fitting work.
Grades and warranty questions
The short answers, each linked to the article set behind it.
What is the difference between genuine, refurbished and aftermarket?
Genuine is the original manufacturer’s part. Refurbished usually means original glass or an original panel reworked with a new touch layer or frame. Aftermarket is produced by a third party, and the quality range inside that category is wide, which is why supplier consistency matters more than the label.
How long should a repair shop warranty a screen?
Long enough to cover the installation, not the accident. Most UK shops cover the workmanship and the panel for a defined period, excluding new physical damage, water ingress and customer-caused faults. Writing the exclusions into the invoice is what makes the policy enforceable.
Can I test a screen without fitting it?
Partially. You can connect the panel and test touch, display, brightness and proximity before the adhesive goes on, which catches the majority of faulty parts. What you cannot fully test is how it behaves once sealed and warm, which is why the pre-seal check is a filter rather than a guarantee.
What causes the non-genuine display warning?
The device cannot verify the panel against the calibration held for that logic board. Transferring the IC from the original screen, or fitting a diagnostic part, is how shops avoid the warning, and the transfer work has to be done well or touch and brightness can suffer.
Should I fit a cheaper grade if the customer insists?
Yes, as long as the quote names the grade and the customer accepts it in writing. The problems start when a cheaper part is fitted at a premium price, because then the dispute is about honesty rather than about the part.
Ask for the grade list and warranty terms
Tell us the models you fit most and the grades you want to standardise on. You will get the grade options with trade pricing, plus a short warranty position you can reuse in your own invoices.
Ask about grades and warranty