1. Determine the Type of Damage

- External screen damage: Touch function is normal, only the outer glass is broken.

- Internal screen damage: Display anomalies, lines, leaks, or touch malfunctions.

- Ribbon cable failure: Display works intermittently, may just need to reinsert the ribbon cable.

2. Preparations

Tools needed:

- Special screwdriver set (including Pentalobe and Phillips).

- Suction cup and pry tool.

- Hairdryer or heat gun.

- Anti-static gloves.

Part selection:

- OEM replacement screen (most expensive but best quality).

- Brand-compatible screen (best value for money).

- Low-quality screen (cheap but prone to issues).

3. Detailed Disassembly and Assembly Steps

- Safety shutdown: Press and hold the power and volume keys to shut down to avoid short-circuit risks.

- Heating to remove the screen: Evenly heat the edges at around 80°C for 2-3 minutes to soften the adhesive.

- Carefully separate: Gently lift the screen with a suction cup, slide a plastic pry tool along the edges, and pay attention to the position of the ribbon cable to avoid damage.

- Install the new screen: Disconnect the battery ribbon cable first, then dismantle the screen ribbon cable bracket, install the new screen, and test all functions.

4. Precautions

- Work in a clean, dust-free environment.

- Organize all screws to avoid confusion.

- Align all clips during installation.

- Test the new screen before applying adhesive.

5. Common Issues and Solutions

- Unresponsive touch screen: Check if the ribbon cable is properly inserted.

- Display anomalies: Try reinstalling the ribbon cable.

- Face ID failure: It may be due to damage to the front camera ribbon cable.

6. Repair Recommendations

For beginners without disassembly experience:

- Watch a complete disassembly video first.

- Have a spare phone ready in case of mishaps.

- Consider purchasing a screen kit with installation tools.

If you find the repair process difficult, seek professional help.

Remember, patience and attention to detail are the keys to successful repair. Don't get discouraged if your first attempt fails – practice makes perfect. Good luck with your iPhone screen repair! And remember, if you ever need professional repair services, don't hesitate to contact HRZ for assistance.

The difference between the two



1. Thickness: LCD screens are thick and hard, and cannot be bent; OLED screens can be bent, making them softer and thinner. From a structural perspective, AMOLED thickness can be nearly 30% thinner than LCD.





2. Price: Due to the mature technology of LCD, LCD is cheaper in terms of price.



3. Service life: LCD screens use inorganic materials, while OLED screens use organic materials. OLED screens have a shorter service life than LCD screens.



4. Color expression: LCD emits light through backlight refraction, so when displaying black, there may be light leakage and whitening around the screen, making black more similar to gray. OLED can express colors through self emission, resulting in a more vivid and full display effect, but there is a risk of screen burn-in.

(Representation of Black)



5. Energy consumption: The luminous principle of LCD is that the color filter film will cause a decrease in light efficiency. Some analyses suggest that the utilization rate of LCD for backlight brightness will not exceed 15%, and 85% of energy is wasted. Therefore, OLED is more energy-efficient than LCD.



LCD is never a slave



OLED screens are often referred to as "blind screens" due to the issue of screen flicker. When adjusting screen brightness, OLED screens use PWM dimming, which is commonly understood as turning on and off every second to control brightness. The brightness is adjusted by the proportion of screen on/off time within the interval.



As long as I light up and turn off quickly enough, my brain cannot feel that I am rapidly switching between light and light states. For some people who are sensitive to screen flicker, PWM dimming is particularly unfriendly to their eyes at low brightness, especially at night, which is why some people may feel obvious eye pain and soreness when using their phones at night.



However, many manufacturers later introduced DC modulation to solve the problem of screen flicker, but with it came the problems of screen burn-in and uneven brightness.



LCD enthusiasts are shouting: LCD will never be enslaved, because of the fatal problem of OLED screen flicker.

(Screen flicker display under camera, image sourced from the internet)



future trends



Although OLED has screen flicker issues, in daily use, the human eye cannot clearly perceive it. Only those who are very sensitive to screen flicker will truly feel discomfort.



OLED with greater power than excess has more advantages, such as better contrast, better black performance, wider color gamut, lighter, thinner, bendable, and so on. That's why mainstream flagship phones now choose OLED screens.

In the future, the development trend of mobile phones will also move towards full screen, curved/foldable screens, and under screen fingerprint and under screen cameras, and the position of OLED will not be shaken. LCD screens will be more commonly used in mid to low end smartphones due to their low cost and mature technology.



So, whether to choose LCD screen or OLED screen, Haoge has summarized their respective advantages and disadvantages for everyone. If you are particularly sensitive to screen flicker, it is recommended to choose LCD. In addition, choosing OLED screen can bring a better visual experience.

1、 External reasons


① Charger data cable


When charging with a non original charger data cable, the voltage is unstable, which can cause the screen to malfunction and jump. It is recommended to disconnect and replace the charger data cable.



② Screen protector film


Poor quality tempered film may affect the touch effect. It is recommended to tear off the film and check if the sensitivity is restored.



③ Water or dirt on hands



You can try wiping the screen of your phone with a tissue to remove any oil stains that may cause touch drift.



④ There is static electricity present


Static electricity on mobile phones can also be uncontrollable. In this case, you can lock the screen and charge the phone for ten minutes to solve the problem.



2、 System reasons


① Software issues


Determine whether it is a certain software or all software fixed area touch failure. If a single software is not sensitive in that area, it may be due to software issues. If all software has the same location touch failure, it is a screen problem and needs to be repaired.



② Too many backend software


Opening the software in the background is likely to cause the mobile phone to get too laggy, and the screen is not sensitive. Try to close the background running software.



③ System issues


If there are many applications installed on the mobile system and the phone configuration is not high, it is easy to cause insufficient phone resources, so this phenomenon may also occur. It is recommended that you try to restore the factory settings or flash the phone.



④ Crash or false crash


It can be resolved by turning off the screen or restarting the phone.



3、 Screen related reasons


Touch failure caused by the screen itself: such as dropping the phone, loosening the LCD screen cable after liquid ingress, and corrosion of the touch IC. These hardware damages can cause the screen to drift and touch failure.



How about it, have you learned how to judge?



It should be noted that the hardware failure of the screen itself involves the repair of internal parts of the phone, which cannot be repaired by an individual. It is necessary to seek professional maintenance personnel for repair and replacement. Do not disassemble or repair it yourself to avoid losses.

Deconstruction of mobile phone screen

Today's smartphones are generally composed of four layers, from top to bottom: cover glass, touch sensor, front panel, and back panel.

Cover glass helps protect devices such as mobile phone touch sensors;

Touch sensors, as the name suggests, are created to assist mobile phone users in operating the phone screen through touch;

The front panel can be equipped with a filter to generate various images that appear on the phone screen;

The backplane plays a crucial role in the mobile phone screen, as it is covered with millions of thin-film transistors;




How to determine whether the inner or outer screen is damaged?

When we use our mobile phones, unfortunately, the screen may get damaged. Generally, there are two scenarios. One is that the outer screen is damaged, and the other is that both the inner and outer screens are damaged. To avoid being ripped off, we must be clear about the condition of our mobile phone, whether it's just the outer screen that's damaged or both the inner and outer screens are damaged.

① Touch: When performing touch operations on the phone, the screen sometimes responds sluggishly;

② Observation: We can conduct observation with the naked eye to detect whether there are issues such as color blocks or water ripples displayed on the phone screen;

In other words, if the touch is insensitive and there is no image displayed on the screen, it indicates that the outer screen is damaged; whereas if the touch is normal but there are issues such as color blocks or water ripples on the screen, it indicates that the inner screen is damaged.



Outer screen damage and inner screen damage

Having known the status of your phone's screen, how to determine which of the inner and outer screens is damaged, and whether to replace only part or the whole? Generally, the price won't be too expensive, and it can also avoid being cheated by unscrupulous merchants. Of course, we can also carry out repairs according to our own situation. Friends with strong practical skills can try it themselves (dismantling is risky, so be cautious). Of course, the most reliable way is to seek professional assistance for repairs.





To avoid the risk of a broken screen on your phone, it's essential to fully protect it with screen protectors, phone cases, tempered films, and other accessories. Friends, if your screen were to crack, how would you handle it? Would you just randomly find a repair shop, or seek after-sales service from the phone manufacturer? When purchasing a phone, do you consider buying screen protector insurance? Why not discuss it together!

1. Principle: Previously, it was written that screen brightness is directly proportional to (ELVDD-data). ELVDD is typically fixed at 4.6V, which means it is directly proportional to (4.6V-data). What is data? Actually, data refers to the voltage corresponding to the displayed grayscale level, or in simpler terms, the content displayed on the screen.





2. Causes of vertical lines: The screen writes the "voltage corresponding to the screen display content" into the backplane row by row. The grayscale data voltage corresponding to these pixels in the "column direction" all enter through a common "line in the column direction".



2-1) If there is a problem with this line in the column direction, the data voltage for the entire column cannot be written or the written voltage is relatively low, resulting in a corresponding bright line (ELVDD-data).



2-2) This charging line in the column direction is driven by the chip, passing through the bending area on the panel, and then reaching the pixel area on the panel. Any issues with these three sections may cause the appearance of bright lines.



2-3) It refers to the "corrosion" phenomenon observed during the repair of a mobile phone by a netizen. This corrosion occurs on this specific circuit path.



2-4) Many users operate their phones in harsh environments, such as high humidity and high temperature areas, where this issue is relatively more prevalent. Of course, poor waterproofing of some screens is also a factor to consider.



3. Solutions



3-1) The repair experts have also devised two repair methods: heating with a hair dryer or lighter, or striking with static electricity. This method is not recommended, as it is only suitable for cases where the corrosion is not completely thorough. It involves a greater element of chance, and there is a high risk of recurrence in the future, so there is no need to spend this unnecessary money.



3-2) The correct approach: Contact the official after-sales service and provide proof of purchase or similar documentation. All phones come with a warranty period, and responsible manufacturers will offer free screen replacement services, even beyond the warranty period. Some manufacturers may charge a fee, but the screen replacement is definitely more reliable than the above method of taking a chance on repairs.