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critical HP
Error Code Red LED flashes 11 times
Processor incompatibility or feature lockout - the current processor does not support features previously used.
? What Causes This
Change of CPU but BIOS remains unchanged, conflicting hardware specifications.
✓ How to Fix It
- Update BIOS to match new CPU capabilities.
- Disable unsupported features via BIOS settings if compatible with system.
Source: page 3 of the official manual
From the manual
This error code appears in:
HP Compaq Pro 6300 SF Desktop