@NeedySR Here are all the possible solutions to many common computer startup issues. Follow the instructions in this document step-by-step to help isolate the problem and find the most appropriate help.
Step 1: Remove discs and devices
Before troubleshooting startup issues, remove or disconnect all discs and devices from the computer.
Turn off the computer.
Remove any discs and USB devices.
Remove memory cards from the card reader slot.
Disconnect all non-essential devices such as printers, scanners, external hard drives.
Leave only the mouse, keyboard, and monitor connected.
After you have removed all discs and devices, turn on the computer.
If the computer starts, reconnect devices one at a time, to determine which disc or device is causing the problem. If the issue is solved, troubleshooting is complete.
If the computer still does not start and exhibits the same problem, press and hold the Power button to turn off the computer. Do not connect anything, and then continue troubleshooting.