The performance of the black screen of the notebook is that after the notebook is turned on, the computer is still powered on, the internal radiator is also running,but the screen is black and no English prompts are displayed. If there are English or Chinese prompts and the "-" symbol, it is not a true black screen. So what should I do if the laptop cannot be turned on? Let's share the reasons and solutions for the laptop not turning on. 

There are many reasons why a notebook cannot be turned on( The performance is that the notebook can be turned on, but the screen is blank). The reasons for this situation may be as follows: 

1.    Motherboard failure, DDR RAM failure

If there are two memory, it is recommended to unplug one memory and reserve one memory for the booting attempt. If not, try another booting test separately. If it is a motherboard problem, it is recommended to send it for repair. 

2. Graphics card, screen cable failure

Generally the graphics card and screen cable are faulty and you can usually enter the operating system. If you have set up boot music, if you can hear the sound of entering the system when you boot up, it means that the graphics card or screen cable is faulty or loose.

For the above hardware failures, it is estimated that most users are unsure, so it is recommended to send them for repair. 

3. Loose hardware

For example, the memory or graphics card is loose, especially the memory has the highest probability. Try plugging and unplugging it again. 

4. Mainboard BIOS error

The motherboard BIOS is wrong. You need to clear the BIOS, complete the discharge operation, and reset it. 

Solution for notebook not turning on:

The above reasons can only answer you about a fault direction. For many people, even if we encounter a hardware failure, we cannot repair it ourselves, but we can try whether the hardware is loose and the motherboard clears the BIOS. 

1. Reseat memory ram

After shutting down the notebook, remove the D side of the bottom of the notebook, and then plug and unplug the memory. If it does not work, wipe the gold finger part of the memory with an eraser or paper and try again. Please change the single memory to try to boot. This means that this memory is not working. Please insert another memory to try. 

2. Clear CMOS battery and discharge

Completely disassemble the D side of the bottom of the notebook. After seeing the motherboard, find the coin cell battery. There is a round plastic-wrapped thing next to the motherboard, which is the coin cell battery. Remove the button at the connection interface, which is generally plug-in type. After the interface is removed, wait for 5 minutes, preferably ten minutes (the time is not fixed, in fact, generally 10 seconds is fine, of course, if Invalid, you can try a longer time), then plug the interface back in, complete the notebook's motherboard CMOS battery discharge, BIOS reset. 

1. System failure

Reinstalling the system will fix it. 

2.Don't recognize the hard disk

The hard disk may be broken. Try to check in the BIOS to deny the hard disk. If it is not recognized, it means that the hard disk is faulty and you can only replace the hard disk. 

3. System boot problems

Use PE system to repair system boot. 

4. The first hard drive is not set on the main hard disk

If you have two hard disks, the main hard disk (the hard disk on which the system is installed) is not set as the first boot item.

The above are the reasons why the laptop cannot be turned on and the solution shared by the installer. Because there are many reasons why the laptop cannot be turned on, it needs to be checked one by one to solve it, we will not proceed even if we know the failure. Repair operation, but we can solve the problem through several simple attempts, especially the probability of loose memory or motherboard BIOS error is relatively large.