1.5.1. Problem: When you apply power, nothing happens1.5.2. Problem: The system seems to start normally, but the display remains black1.5.3. Problem: When you connect power (or turn on the power switch on the back of the power supply), the power supply starts briefly and then shuts off1.5.4. Problem: When you apply power, the floppy drive LED lights solidly and the system fails to start1.5.5. Problem: The optical drive appears to play audio CDs, but no sound comes from the speakers1.5.6. Problem: SATA drives are not recognized1.5.7. Problem: The monitor displays BIOS boot text, but the system doesn't boot and displays no error message1.5.8. Problem: The monitor displays a Hard Drive Failure or similar error message1.5.9. Problem: The monitor displays a No Boot Device, Missing Operating System, or similar error message1.5.10. Problem: The system refuses to boot from the optical drive1.5.11. Problem: When you first apply power, you hear a continuous high-pitched screech or warble