Could be a hardware issue that occured at the same time but before jumping to those scenarios try this.
Please try following steps to completely uninstall VS.
Follow this document: Remove Visual Studio and use the InstallCleanup.exe tool:
Close the Visual Studio Installer > Type cmd in the Type here to search box > Right-click Command Prompt, and choose Run as administrator > enter the command line like ”C:\Program File (x86)\Microsoft Visual Studio\Installer\resources\app\layout\InstallCleanup.exe” -i
After that, please try to reinstall VS 2019 from here: Downloads.
If the InstallCleanup.exe tool doesn’t exist, please try to delete Visual Studio IDE installation folder manually and remove the VS IDE from Control Panel and then reinstall VS again.