If your desktop computer is not displaying correctly, there are a few steps you can take to troubleshoot the issue. First, make sure that the monitor is working properly. Restart your computer and ensure that it is turning on from a completely turned off state. If there is a conflict between peripheral devices, this can result in a black (blank) screen or the screen not appearing.
You can also check the CPU's performance in the BIOS to determine if there are any display problems due to the PC overheating. If your PC still doesn't display information on the monitor with nothing more than the basic hardware installed, a POSTCARD can help you identify which part of the remaining hardware is causing the computer not to turn on completely. If these steps do not resolve your issue, you may need to start a more complicated and slow troubleshooting process with the rest of the computer. This may involve replacing parts or running diagnostics tests.
It is important to take your time and be thorough when troubleshooting computer display issues.