how to replace macbook lcd screen

not been controlled by the switch, that is, the motherboard to the High-voltage generator circuit issued by the switch signal lost control. Because the motherboard microprocessor sends out the switch signal generally to pass through several transistors to control, therefore the fault may be the control switch signal transistor damage. The thinking of fault maintenance for the screen of the boot display 1, first open the

screen as long as the real realization of high stability and high resolution, will replace other technology products and become the mainstream touch screen market. The resolution of the infrared touch screen in the past is determined by the number of infrared tubes in the frame, so the resolution is lower, the main do

A few days ago, the customer brought a notebook computer, said that the screen appeared bright spots. He started to think it was the video card, but after reinstalling the video driver, the spot still existed. In fact, the LCD screen appears white spots mostly because of the physical damage to the screen. Notebook disp

interference away from the installation of the video card (such as hard disk) and check whether the screen disappears. If it is determined that the electromagnetic shielding function of the video card is not enough, you should change the video card or make a self-made screen cover. Step 4: Check whether the resolution or refresh rate of the monitor is set too high. The resolution of the

world, are all reflected in the "MacBook Pro Huati event." But, sadly, Apple has yet to respond. The netizen that appears this kind of question reflects, they are basically watching high-definition movies, external monitors, televisions, projectors, editing large photos and other graphics-intensive tasks, MacBook Pro Computer will appear white screen, Huati, li

point of the motherboard voltage, to pay attention to the voltage (4.8V), reset voltage (high or low level, according to different models), MCU voltage. If a power supply short circuit, to carefully find short circuit position, there will be PCB board copper foil may be short circuit (2) Find out whether the contact between the MCU and the motherboard is good (3) Check whether the motherboard chip and MCU work, can be used to measure whether the crystal oscillator vibration (4)

I haven't written a computer repair experience for a long time, think about it, big things, small things are quick to make me not like people, hehe! Well, today in the shop finally idle down to write a monitor repair feeling, just repaired a benqfp71e LCD screen boot black, the failure of BenQ machine has high pressure board part of the common problem, This should be recognized, the fault is mostly turned o

const *const LCD_FILE = "/sys/class/backlight/pwm-backlight/brightness"; As char const *const LED_FILE = "/dev/an30259a_leds"; This should be the node that prompts the light, regardless of him. Then, under mm, we get a lights. Default. So, and replace this. So. There is also a permission issue. To open this node, you need permissions. Then you can add the permissions in init. XXX. RC. chown system system /sys/class/backlight/pwm-backlight/brightnes