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Blog1 min read

How to tell if a phone screen is aftermarket: tests you can do at home

A few tests tell you, to a large extent, whether the fitted screen is aftermarket. On iPhone, Parts and Service History shows the screen’s status. On a phone with an OLED screen, if a black screen glows faintly in a dark room, an LCD part may have been fitted. The fingerprint reader and colours also give clues.

Cep Market Repair TeamIn Kadıköy since 2006
Key points
  • On iPhone, check Parts and Service History.
  • If a black screen glows on an OLED phone, it may be an LCD part.
  • If the in-display fingerprint reader fails, the part should be checked.
  • Compare colour and brightness side by side with the same model.
  • The type of part fitted should be on the invoice.

01Five tests

  1. Parts and Service History (iPhone). Under Settings › General › About, supported models show whether the screen is genuine or an “unknown part”.
  2. Dark room test. Hold the phone in a dark room on a fully black image. On a model with an OLED screen, a faint glow may mean an LCD-technology part was fitted.
  3. In-display fingerprint. On phones with an in-display reader, if the reader fails or is very slow, the fitted part may be incompatible.
  4. Side-by-side comparison. Compare colour and brightness on a white page with a phone of the same model.
  5. Edges and invoice. Look for a gap at the edge or a thick bezel; check whether the invoice states the part type.

02What the results tell you

Test resultWhat it may mean
“Unknown part” in parts historyA non-genuine or unverified screen
A black screen glows on an OLED modelA compatible screen with LCD technology
In-display fingerprint failsA part incompatible with the reader
Washed-out colours, grey blacksA compatible panel

With a well-done replacement, not every test gives a clear answer. Problems by symptom are in iPhone aftermarket screen problems, the difference between screen types in aftermarket, used and original screens, and whether an iPhone has been opened in how to tell if an iPhone has been repaired.

Brand › Model › Repair listChoose your model, ask about the faultiPhone models

03How to get your phone to us

Visit our store

Hasanpaşa Mh. Söğütlüçeşme Cd. No: 192 (opposite the mosque car park), Kadıköy. Monday – Friday 09:00 – 20:30 · Saturday 09:30 – 20:30 · Sunday: Please ask.

Send it by post

Free two-way shipping with our contracted carrier from anywhere in Turkey. Send the device without its case, in a well-protected box, with a note giving your phone number and the fault.

Motorbike courier

Within Istanbul you can send your device by motorbike courier; just send us your address and the fault on WhatsApp.

FAQ

Frequently asked questions

01

Can I be certain the screen is aftermarket?

The tests give a good idea; with a well-done replacement, a clear answer is not always possible.

02

How is the dark room test done?

Open a fully black image in a dark room; on an OLED model, a faint glow may mean an LCD part was fitted.

03

Where can I see whether an iPhone screen is genuine?

On supported models, in Parts and Service History under Settings › General › About.

04

Will a screen replacement delete my data?

Data is usually preserved during a repair; still, you need to back up your data before the repair starts (backups are the customer’s responsibility).

Customer reviews

What our customers say

★★★★★

They replaced the screen of my iPhone 17 Pro Max with an original one within an hour. Emir and Kerem looked after me very well. An amazing business.

Ali E.Customer review · Translated from Turkish
★★★★★

I had the screen and battery of my 14 Pro Max replaced and I am very pleased. Thanks for your work.

Oğuzhan O.Customer review · Translated from Turkish
★★★★★

I think you will be pleased with their approach, their helpfulness and their care.

Our customerCustomer review · Translated from Turkish
★★★★★

This is the place I have shopped at with endless trust and sincerity for 20 years, since the Cep Market days. I am so glad you are here; Teknoway is the only place for me.

Cavidan T.Customer review · Translated from Turkish
★★★★★

A very good business with friendly staff, and they answered every question I had in full. Thank you, Teknoway.

ParlakplaystationCustomer review · Translated from Turkish
★★★★★

A company I have known for a long time that helps in every way it can. I definitely recommend dropping by and at least listening to their ideas and advice.

Murat Y.Customer review · Translated from Turkish
★★★★★

We had a screen protector fitted, and they gave us gifts I think were worth more than the screen protector. Most of all, thank you for the friendly welcome.

Mehmed P.Customer review · Translated from Turkish
★★★★★

Can looked after me very well and fixed the phone flawlessly. Thank you. When the repair was done, I realised I had left my phone with real experts.

Mustafa Ö.Customer review · Translated from Turkish

From our customers’ reviews. All reviews

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Let us check your screen together

Send your model on WhatsApp; we look at the screen type for free.

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