Identify the Problem:

Nothing happens at all: power issue. Fans spin but no display: hardware issue. Stops at logo: system issue. Diagnosis guides your approach.

Check Power Supply:

Verify wall outlet works. Check power cables are connected. Look for PSU switch position. Try different power cable.

Remove External Devices:

Computer might try booting from USB device. Remove all USB devices and external drives. Try starting again.

Access BIOS:

Press Del or F2 during startup. Verify boot drive is detected. Check boot order settings. Reset to defaults if uncertain.

Run Startup Repair:

Boot from Windows USB. Choose Repair your computer > Startup Repair. Fixes boot configuration automatically.

Rebuild Boot Configuration:

From Recovery Command Prompt: bootrec /fixmbr, bootrec /fixboot, bootrec /rebuildbcd. Repairs Windows boot loader.

Conclusion:

Startup Repair solves most boot issues. Hardware problems require physical inspection or professional diagnosis.