However, not many people know quick and effective ways to fix this.
you could try each of them until you get rid of the error.
8 Solutions Your PC Turns on But No Display
Part 1.

Its possible that your box is working fine and your monitor is the only problem.
If not, keep reading to find other solutions to fix this issue.
Method 2. confirm your machine has completely restarted
Ensure that your PC is coming from a completely powered-off state.
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After that, turn on this PC to check whether it can boot normally.
If this switch is wrong, maybe your PC wouldnt power on at all.
Therefore, an incorrect power supply voltage might prevent your gear from starting properly.
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Related article:How to Tell If PSU Is Failing?
How to Test PSU?
However, sometimes, Windows Automatic Repair not working issue will happen.
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Thus, most users will try resetting the PC.
Resetting is usually a magic fix to problems like the PC turning on but no display.
In this case, try clearing the BIOS memory on your motherboard, which willreset the BIOS tweaks.

Reseat the memory modules
If a memory module is loose, the computer might not display an image.
In other words, your system starts but the screen is black.
Related post:How to Add RAM to a Laptop?

See the Simple Guide Now!
If your rig beeps and does not start, there might be a more serious hardware issue.
Check Hardware
Take a look at the actual hardware.

Then, try turning on your setup again.
Facing a black screen after pressing Alt + Tab keys?
Read this post to know how to fix the Alt + Tab black screen issue and recover data.

Part 2.
In this case, users are unable to access files in the drive.
Professional data recovery softwareis designed to serve people who have trouble booting up the Windows operating system.
To recover data from an unbootable computer.
Then use that bootable data recovery tool to scan and recover lost data.
Step 3: Click theBootable Editionicon at the top-right menu bar.
Step 4:Create a bootable USB diskor CD/DVD disc using the MiniTool Bootable Media Builder.
Step 2: Click onMiniTool Power Data Recoveryto go to its main interface.
Note: Never save the selected files to the drive where you lost your data.
Otherwise, the lost/deleted files will beoverwritten.
We will solve it as soon as possible.