A PC that won’t boot usually has a power, hardware, or software issue.
Common causes
- Loose cables
- Dead power supply
- Corrupt system files
- Faulty RAM
1. Loose cables
Simple but common.
Quick fixes:
- Check power cable
- Check monitor cable
2. Dead power supply
No lights = PSU issue.
Quick fixes:
- Try another socket
- Check switch on PSU
3. Corrupt files
Windows may fail to load.
Quick fixes:
- Boot into Safe Mode
- Run Startup Repair
4. Faulty RAM
RAM issues stop booting.
Quick fixes:
- Reseat RAM sticks
What to try first
Check the power cable.
When to call a professional
If the PC shows no signs of life.