troubleshoot display related faults in your laptop

by:Haojingyuan     2019-10-22
When you wake up one morning and the laptop monitor goes black, you don\'t necessarily panic.
Many beep codes and visual signals should guide you through diagnosis and trouble shooting.
First, a blank laptop screen may point to a faulty motherboard, and a dim display may be a symptom of a faulty inverter or LCD/LED screen.
In addition, depending on the model and brand of the laptop, you can also use the light code next to the power supply
Turn on the light and read the status of the laptop.
For example, an activity or inactivity on a disk drive light should indicate a successful or failure to start.
Third, the beep code can also guide you to troubleshoot the blank screen.
A single beep should signal a normal start-up, while multiple beeps should signal a component failure while the screen is not displayed. 1.
Blank/black screen completely blank after power supply
The symptoms of the notebook computer failure are: memory module failure (RAM)
Loose fiber connection on laptop screen or motherboard faulty monitor chip faulty motherboard or microprocessor chip in the absence of monitor first connect laptop to external monitor via VGA or other monitor port
If everything is OK, there should be a display on the external monitor.
If the external monitor does not recognize the laptop immediately, try restarting the laptop with the connected signal cable.
If the external monitor is not displayed even if the laptop is restarted, continue to check the memory modules to make sure they are OK.
You can turn on the back of your laptop, re-scan the RAM sticks, or replace them to see if there is a positive reaction.
Some laptop brands have extra RAM slots under the keyboard.
You may need to look around for all the RAM modules and slots.
Alternatively, use Memtest to use a separate laptop to understand the reliability of the chip.
However, if the RAM is OK and the external monitor is showing well, then the fault should be elsewhere.
You may need to turn on your laptop and check the LCD/LED fiber connection on the motherboard or on the screen itself.
Although these connections are usually firm, shrinking/expanding, aging, and repeated turn-off/turn-on of the laptop screen can almost take it out of place.
For example, a slight expansion of the fiber will cause the laptop display to appear garbled and cannot be read.
It\'s bad enough to disconnect completely.
If the fiber connection is strong, you may need the help of a computer technician to diagnose the health of the LC/LED screen or try other screens.
This should not be done at home unless you know what you are doing and have the corresponding spare LCD/led at home.
Another component that is prone to failure is the graphics processing unit (GPU)chip.
The chip is located near the microprocessor and the control screen display may fail due to overheating.
As we all know, AMD\'s notorious nVidia graphics chip has failed after years of extensive graphics use.
Despite the GPU failure, you can sometimes view the information on the LCD/LED or on the external screen, even though the image is garbled.
However, in most cases, the problematic GPU does not allow you to view the information on any one screen.
You\'ll know this when everything else, including Windows, seems to run smoothly in the background.
Fixing a graphics chip is a tricky business because it involves the use of hot-gun.
This repair does not guarantee a permanent chip repair.
In fact, you will get it less than a few months after the repair.
If none of the above solutions results, a motherboard or microprocessor in the laptop may fail.
At this stage, Motherboard or microprocessor replacement may be the best solution that can be done by the technician next door.
However, if you have a compatible microprocessor in your home and know what you are doing, try swapping it and see the results.
On the one hand, replacing the motherboard is a long process and unless the laptop means a lot to you, it may be time to buy a new one. 2.
The laptop monitor is dim. The dimly lit display means the laptop is fine unless it doesn\'t have enough light to light up the LCD/LED screen.
The dim display has the following symptoms: a failure of the display causes the backlight lampsBrightness to be set too low. If the laptop screen is dim, the inverter or backlight fault should be blamed, but usually the inverter fails.
Backlight failures rarely occur, and the only option when it happens is to completely replace the LCD/LED screen.
Replacing the backlight on the inside of the LCD can be an annoying experience as it includes taking apart the LCD screen and playing around with a small and delicate light.
On the other hand, replacing the inverter for the LCD screen is more sensible than repairing it.
It requires meticulous repair procedures, which should not be done at home.
Finally, make sure that the brightness of your laptop is not set too low, especially when your laptop has a brightness adjustment knob or a button.
Just tap the button and the screen will return to normal. 3.
The LCD/LED screen of the laptop is broken and may also fall to the floor causing the LCD/LED screen to break down.
While some breakage may not be noticeable in closed laptops, cracks on the screen will show up when turned on.
Fortunately, if you know how to turn on the LCD/LED and assemble it back into the laptop cover, the LCD and LED repair should not be that complicated.
Connect the LCD screen to the laptop motherboard via a video cable (fiber)
The top connection should only be disconnected when replaced.
At the bottom of the LCD screen there is a dual power cable connected to the inverter, which is located directly below the LCD.
At the same time, the LED is only connected to the motherboard using a video cable and does not use a traditional inverter.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...