Win7 system deleted a file. After that, the black screen was rebooted. Then f8 fixed it a bit.

The following steps can be used to mount the system, CD-ROM and USB flash drive installation methods:

Prepare an empty ***, CD disc, and then burn Win7 (iOS file format) to your CD;

Use a larger USB flash drive or mobile hard disk to back up important files in the old system; (This step is ignored if the disk is fully formatted).

Put the burned win7 system disk into the optical drive where you need to reinstall the operating system and start the computer;

Press the DEL key to enter the BIOS to set the CD-ROM boot during the boot process, or press the F12 key to directly select the CD-ROM to boot during the boot process;

Windows 7 installation interface appears, first select Chinese (Simplified), Chinese (Simplified, China), Chinese (Simplified) - American keyboard, select and click Next, and then click "Install Now";

The installation agreement will appear during the startup of the installer, and I accept the license terms will be checked;

Keep going next until the partition interface appears, here select the first partition, type System, and then click Next (before this we can format our first partition, in the drive option (Advanced) (a) there);

After the partition is completed, wait for a while, after a while to remind the installer that the service is starting, and then remind you to restart your computer after the installation process will continue, here it is fully automatic;

After restarting again, take out the installation disc,It will automatically detect the hard disk boot into the system,Here there is a startup windows screen,The installer is checking the performance,Then see let the setting computer name enter the PC name here (take a name at will),Click Next,Password interface skip,Don't enter,Then the screen goes to enter the key,If it's genuine, then fill it in,If not,Don't fill it in,Use the activation tool later。

There are many reasons for a black screen, such as memory, hard disk, graphics card, motherboard, monitor, power supply, etc. First you have to start with the software, and then the hardware. Clause.

1. Clean the dust, redial and reinsert to ensure that it has nothing to do with loose hardware.

Clause. Second, take a look at whether the motherboard has explosive capacitors, and the CPU will crash if it overheats. The temperature can be viewed from the BIOS.

Clause. Second, use the software to scan the memory for damage, and the HDD to scan the hard disk for bad sectors.

Clause. 3. If possible, reopen the area and reinstall the system.

Clause. Fourth, make sure that it has nothing to do with the software, if there are conditions, borrow someone else's hardware to replace it and try it, and eliminate it one by one.

Clause. Fifth, if you can't do it yourself, you can only ask professionals to repair it.

This is my experience, I hope it will help you!