Desktop computer,window7 system boot black screen,All parts are in good contact,Boot motherboard has

There is no black screen after entering the system, whether the black screen after entering the system or before entering the system, that is, there is no icon for the window.

If the screen is black before entering the system, it is a problem with the memory module, open the case, unplug the memory module, and use the eraser to erase the gold finger. Or if you're not sure, go to a friend and borrow a good memory module to plug it in.

If the black screen after entering the system, it may be a hard disk problem, generally a blue screen and other conditions, the most serious is the bad sector of the hard disk, which needs to be repaired by the hard disk before reinstalling the system. If not, you have to take it for repairs.

You can press Ctrl+Alt+del

Call out Task Manager, create a process explorer, and check for viruses.

Is there an over-frequency? This problem will occur if the overclocking is too high, try adding some voltage. Or drop back to the default frequency. If it doesn't work, you will find trouble with the power supply. It's also possible that the second floor said that I had a virus that caused this kind of thing to happen.

It's not a hardware issue! It's a system problem! Do not restore the system.

It's about reinstalling the system! Give it a try.

Absolutely!

1. Whether the computer monitor and the host are normally connected to the power supply, and whether the power indicator is on. 2. If it is a notebook to check the power indicator of the computer, if it is not lit and the computer is connected correctly, it is very likely that there is a problem with the motherboard, please send it to the warranty point for repair in time.

Hello, according to your current problem description, the problem is estimated to be system instability caused by the accidental deletion of system files on the user profile.

The suggestion is to reinstall the system, repair the system files, rebuild the user profile, do not easily delete the system files in the future, over-clean the system junk, and optimize the system.

Let's reinstall the system. You can't get in, you can't set and delete any files at all, you have to reinstall the system.

Are you pouring juice into the keyboard. Accidentally. Or, hit the keyboard.

Try it in safe mode. Press F8 immediately after booting or not turning on the phone to press F8 without moving to the advanced option to appear in the release of the hand, use the up and down keys to select the safe mode enter, enter the safe mode and use the software to kill the trousers before the horse, uninstall all the things installed before the accident, restore the system or reinstall the system (if you can enter the safe mode, it means that you have installed inappropriate things, uninstall all the inappropriate things before the accident, and you are hit by the Trojan, use the software to kill the Trojan, if not, restore the system or reinstall, If you can register the macro to enter normal mode, do the same in normal mode as above).

If the above methods can't solve the problem, first soft and then hard, reinstall the operating system, don't install software, patches, drivers, etc., and see if there is still a problem with booting? If you don't install drivers, patches, and software step by step, and find something that isn't suitable, don't install it.

Please note: If you restore the system or reinstall it, when installing drivers, patches, software and other things, be sure not to install the things that affect Hu Ziqing's accident this time, otherwise it will be restored or reinstalled in vain.

In terms of hardware, such as hard disks, memory, graphics cards, motherboards, etc., if there is a problem, if it is caused by hardware problems, it is recommended to overhaul it.