Some users may encounter the phenomenon of a black screen when using a laptop, which requires careful examination of the relevant reasons to find the problem in order to better solve such problems.So how to do a black screen on a laptop?Let's take a look at it next.

Laptop computer boot black screen how to do: check the display lamp

Laptop computer boot black screen there is another situation is on the laptop press the boot button laptop no response, no light on, most of this situation is the power supply line failure, or boot button failure, the general user recommended to get repair shop to overhaul, conditional users can dismantle their own machine to see the next.
Laptop boot black screen in fact, there is also a relatively easy to ignore a situation, that is, the lack of power, once encountered a new computer bought soon, in a use of computer boot black screen, urgent call to ask the after-sales service to ask so, boot all power.Hard drive light indicator is normal, but the monitor is a black screen, ask its recent collision or fall nothing to do, on last night in bed watching a movie all night, during the day.Plugged the power in and booted up fine, it turned out to be the laptop power supply due to excessive use and insufficient power.

Laptop boot up black screen how to do: check power indicator

Exclude non-motherboard .In addition to the graphics card failure, is a common LCD screen failure.If a little something is vaguely displayed that the LCD screen and the line is not damaged, it is possible that the backlight is not lit.Backlight can not be lit for two reasons: backlight tube burned or drive the lamp's high-voltage circuit damage.
The high voltage circuit board works by converting the low voltage DC power provided by the motherboard into high frequency high voltage power through a switching circuit to light up the backlight tube.This can just press the boot button to start when the ear against the screen bezel to listen carefully, if there is a zipping sound for a while, and then no sound, roughly the problem of the high-voltage circuit board, if it has been silent, it may be a lamp problem.This amateur condition judgment is not too professional, but still more practical.