!!
critical HP
Error Code Red LED flashes 9 times
System powers on but is unable to boot - often due to a failure in POST process.
? What Causes This
Critical post-processor error or corrupted bootloader.
✓ How to Fix It
- Perform CMOS reset (if BIOS settings are corrupt).
- Contact professional service if the issue persists.
Source: page 3 of the official manual
From the manual
This error code appears in:
HP Compaq Pro 6300 SF Desktop