FAQ
TL;DR: Purple stains after a Galaxy S7 screen swap usually mean a bad/regenerated OLED; "You have to pay the original for about PLN 600" and replace it. [Elektroda, tino2003, post #17130562]
Why it matters: For DIYers and repair shops, this FAQ shows how to diagnose stains fast, choose genuine parts, and handle warranty returns without destroying the screen.
Quick Facts
- Purple spots on an S7 replacement screen = OLED damage; replacement is the only fix. [Elektroda, KamGr, post #17129894]
- Typical price for a genuine new S7 display: Approx. PLN 600. [Elektroda, tino2003, post #17130562]
- Avoid regenerated panels; buy new originals from reliable sources. [Elektroda, pacholik, post #17130274]
- Over-pressing would crack the panel; stains suggest poor-quality/rebuilt screen. [Elektroda, pacholik, post #17130274]
- If defects appear, ask the seller for a warranty exchange. [Elektroda, KRY5PIN, post #17132118]
What causes purple spots on a Galaxy S7 after screen replacement?
Those blotches indicate panel damage or a low-grade regenerated OLED assembly. A member called such modules “junk after regeneration” that create these “flowers.” Reinstalling, cleaning, or updating software won’t remove stains. Replace the entire display with a new, original unit. [Elektroda, tino2003, post #17130562]
Can I fix the stains without replacing the display?
No. As one technician wrote, “you will not get rid of it.” The only remedy is installing a new display assembly. Massaging, heating, or recalibrating cannot restore damaged OLED subpixels. Proceed to warranty or replacement instead. [Elektroda, KamGr, post #17129894]
Could pressing the screen too hard cause this?
Unlikely. Excess frame pressure typically cracks the display and it stops showing an image. Stains that appear later point to panel quality rather than pressure. Focus on sourcing a new, original module from a trusted supplier. [Elektroda, pacholik, post #17130274]
The screen looked fine, then stains appeared an hour later — is that normal for bad panels?
Yes. The report here shows the phone worked, slept, then woke with “beautiful spots.” That timing suggests a defective screen, not contamination. Replace the module rather than chasing installation errors. [Elektroda, zygzag, post #17129170]
How do I avoid this on the next replacement?
Buy new original displays from reliable sources, even if they cost more. As advised: “better to pay more” to ensure a working result. Verify supplier reputation and return terms before installing. [Elektroda, pacholik, post #17130274]
What is a fair price benchmark for an original S7 display?
Use about PLN 596 as a benchmark for an original S7 display from a reputable wholesaler like Magboss. If a quote is far above or below this, verify authenticity and warranty before purchase. [Elektroda, tino2003, post #17130751]
What price pitfalls have others encountered?
One buyer reported paying PLN 800 for a display sold as “original” and later doubted its origin. Treat steep pricing and vague claims as red flags. Ask for proof of originality before buying. [Elektroda, zygzag, post #17130733]
How can I tell if a part is truly original, not regenerated?
Rely on verified suppliers and OEM part numbers instead of visual checks. The thread cites Samsung P/N GH97-18523A sold by Magboss as an original module. Cross-check the P/N and the seller’s warranty on originality. [Elektroda, tino2003, post #17130751]
Should I peel off the just-installed screen to send it back?
No. Peeling a bonded AMOLED after installation can destroy it instantly. The poster who tried to remove theirs “fired” it and it went to the trash. Stop and pursue a warranty claim instead. [Elektroda, zygzag, post #17411740]
What’s the right next step when stains appear? (3-step plan)
- Stop using the device and photograph the stains in good light.
- Contact the seller and request a warranty exchange or refund.
- Wait for return instructions; do not lift or peel the display. [Elektroda, KRY5PIN, post #17132118]
Does cleaning under the display or reseating help?
No. The installer reported a very clean build, yet stains appeared later. That outcome indicates a defective panel, not dirt or flex seating. Replace the module rather than reworking the install. [Elektroda, zygzag, post #17129170]
Where should I buy an original S7 display?
Choose known distributors with transparent listings and OEM P/Ns. The forum points to Magboss for original GH97‑18523A displays. Compare their offer with yours and check return conditions. [Elektroda, tino2003, post #17130751]
