Mobile phones have become an indispensable product that everyone carries with them in their daily lives. So when the screen of the mobile phone does not light up, how do we troubleshoot and solve it? Below I give five major problem points, and everyone will try to solve them accordingly.
1. Battery or charging cable problem, replace the charger or battery.
When the mobile phone battery is out of power, the entire mobile phone cannot be turned on, and the screen will not light up at this time. The solution is to plug the charger into the mobile phone to see if the charging status is displayed. If there is no response, first check whether the charger has a normal output voltage. If there is no response after charging with a normal charger, the mobile phone may have a damaged battery that cannot be charged. Now mobile phones all have built-in batteries, and it is recommended to find a special mobile phone repair person to replace the battery.
2. The power button fails, replace the power button.
After the mobile phone is in standby mode, the screen light will go out. This requires pressing the power button or the screen button to light up the screen. If the button fails, this command cannot be triggered. You can use a multi-purpose pen to test whether the switch button is normal. When the button is pressed, the key switch is turned on. If it is in a disconnected state when pressed, it is determined that the switch button is damaged and can be replaced.
3. The display cable is loose, disassemble the phone and reconnect it.
If the display is not bright, it may also be caused by the loose display cable. You can disassemble the phone case and find the cable connecting the display and the motherboard to see if it is well connected.
4. The display is damaged, replace the phone screen.
If you are sure that there are no problems with the above steps, you can basically judge that the phone display is broken, and you can directly replace the display.
5. The system freezes or runs away, re-flash or restart.
Finally, the phone system problem is not ruled out, but such problems generally rarely occur. If the above solutions are not feasible, you can try to re-flash the phone.
Summary: Generally speaking, the phone screen is not bright because the screen is damaged or the switch button fails. There are also abnormalities in the phone battery.
M+, a professional mobile phone screen supplier in China, provides LCDs for mobile phone repair engineers in various countries.
