FAQ
TL;DR: LG K4/K4 Dual 2017 screens are bonded; even pros report ~1‑in‑10 failures; "there is no chance to do it correctly" without proper gear. [Elektroda, bogdan2491, post #20165779]
Why it matters: This FAQ helps DIYers and repair shops decide whether to replace only glass or the full display, what tools are required, and how to avoid flooding the backlight.
Quick Facts
- K4/K4 Dual 2017 use a glass+LCD assembly; treat it as combined for service. [Elektroda, bogdan2491, post #20165779]
- Home users should replace the complete LCD with touch, not just the glass. [Elektroda, tino2003, post #20165665]
- Pro refurbishment usually needs a separator, laminator, OCA, and an autoclave to clear bubbles. [Elektroda, rakoslaw123, post #16860650]
- Use OCA adhesive sheets for LCDs; liquid UV glue can flood the backlight. [Elektroda, blahfff, post #20163227]
- K4 and K4 Dual 2017 share the same fast-assembly approach. [Elektroda, KRY5PIN, post #16865991]
Is the LG K4 glass integrated with the LCD, or separate?
Treat the LG K4/K4 Dual 2017 as a bonded glass+LCD module. Technicians describe it as combined, so plan replacements accordingly. [Elektroda, bogdan2491, post #20165779]
Is the LG K4 Dual 2017 built the same way as the regular K4?
Yes. Forum technicians confirm the K4 and K4 Dual 2017 use the same fast-assembly construction. Procedures and risks are the same. [Elektroda, KRY5PIN, post #16865991]
Can I replace just the cracked glass at home?
Do not attempt glass-only at home. Replace the complete pre-assembled LCD+touch module for a reliable result. [Elektroda, tino2003, post #20165665]
What tools do professionals use for glass-only refurbishment?
Pros use a heated separator to lift glass, a laminator to bond new glass with OCA, and an autoclave to remove bubbles. [Elektroda, rakoslaw123, post #16860650]
Do I need a laminator, and what adhesive should I use?
Yes. A laminator is a special device for bonding with OCA sheets. Avoid liquid UV glue on LCDs to protect the backlight. [Elektroda, blahfff, post #20163227]
Will UV glue and a nail lamp work for this LCD?
No. Liquid UV glue can seep into the backlight and cause stains; use OCA sheets with proper lamination instead. [Elektroda, blahfff, post #20163227]
What does the autoclave do in screen refurbishment?
After lamination, the autoclave removes trapped air to prevent bubbles under the new glass and improve optical clarity. [Elektroda, rakoslaw123, post #16860650]
What are realistic success rates and risks?
Even experienced shops are not 100% successful; expect about 1 failure in 10 attempts. Quote: "there is no chance to do it correctly" without gear. [Elektroda, bogdan2491, post #20165779]
In this thread, does “fast” mean the touch digitizer layer?
Yes. A participant clarified “fast” as the top touch layer, asking if touch still works despite a crack. [Elektroda, KRY5PIN, post #16863725]
Is there a quick glass-only replacement guide online for the K4?
Follow full-module swap guides instead. The forum consensus for home repair is complete LCD+touch replacement. [Elektroda, tino2003, post #20165665]
How do I safely replace the K4 display at home?
- Buy a pre-assembled LCD+touch for your exact K4 variant.
- Power off, disconnect battery, transfer small parts, and install the module.
- Reconnect, test touch and display before sealing the frame. [Elektroda, tino2003, post #20165665]
Can other thin plastic glues substitute for OCA?
No. For LCD stacks, use OCA sheets. Other liquid glues risk backlight flooding and uneven optical results. [Elektroda, blahfff, post #20163227]
What is a separator in phone repair?
A separator is a heating device that softens adhesive, allowing controlled lifting of cracked glass from the LCD. [Elektroda, rakoslaw123, post #16860650]
Is the K4 glass truly separate from the LCD on some units?
One early reply claimed separation, but later posts treat the assembly as combined for service. Plan for bonded repair steps. [Elektroda, bogdan2491, post #20165779]
What’s the expert take on DIY glass-only for K4?
“There is no chance to do it correctly” without proper equipment and experience; buy the full assembly instead. [Elektroda, bogdan2491, post #20165779]
