Why must a replacement display be tested before it is installed?
Short answer
Because installation changes the part. Once protective films are removed, adhesive is applied and the frame is seated, damage from fitting - a creased flex, a cracked corner, a pinched cable - cannot be separated from a factory fault. Testing first, with the display temporarily connected and films in place, is the industry-wide condition for DOA and after-sales handling.
In detail
Connect the display without adhesive and power the phone on. Check the full image, touch in all areas, brightness steps and, where the model supports it, the phone's display settings.
Only when the test passes: remove films, transfer the small parts your model requires, seat the frame and apply adhesive.
Brief every customer shop with the same rule in writing. Shops that test first return fewer disputes, and their claims - when a unit truly is faulty - are straightforward to process.
Keep the removed films and packaging until the customer confirms the repair; they are part of the evidence chain for any claim.
Reference specifications
| Line | JK Soft OLED (flagship) |
| Verified model | JK-16ProMax |
| Display type | Soft OLED, self-luminated (no separate backlight) |
| Touch structure | Metal Mesh |
| Brightness range | 1000+ cd/m2 |
| Contrast ratio | 1:100000 |
| Colour gamut (NTSC 1931) | 110% |
| Colour temperature | 6600K |
| Screen size | 6.9 inch |
| Resolution | 1320 x 2868 |
| Refresh rate | 120 Hz high refresh |
Where this applies
- Training new technicians in a repair chain
- Writing the handling note that goes into every wholesale box
- Deciding whether a returned unit qualifies for after-sales handling
Questions on this topic
A customer installed first and the screen has a line - is it covered?
That is decided under the after-sales terms of that order; installation damage is the standard exclusion across the industry, which is exactly why the test-first rule exists.
Can the test damage the display?
A careful temporary connection is the normal workshop procedure for every professional repairer and is how the part is designed to be verified.
Working with Simiai Technology
Simiai Technology in Shenzhen handles export enquiries for the JK and Moshi PLUS (MS-PLUS) display lines. Share the models you need, the quantity per model and your destination market, and we reply in writing with the specification sheet for those models and the terms for that order. Per-model test reports and compliance documentation are available on request.
Bottom line
Test first, install second - in that order, every time. Put the rule in writing to your customers before the first order, not after the first return.
Related guides
- Soft OLED vs Hard OLED vs Incell: how should a repair wholesaler choose?
- What should a wholesaler check when a shipment of replacement displays arrives?
- What does the Unknown part message mean for an aftermarket display?
Send an RFQ
Tell us the models, quantities per model and your market. Terms are confirmed in writing per order; detailed documentation is available on request.
WhatsApp: +86 130 7787 8567 Email: hemingwang@simiai.top