!!
critical HP
Error Code Red LED blinks 7 times every second followed by a 2 seconds pause
System board failure (ROM error).
? What Causes This
Faulty system BIOS or defective motherboard.
✓ How to Fix It
- Try clearing CMOS memory and rebooting the PC.
- Replace system board if issue persists.
Source: page 2 of the official manual
From the manual
This error code appears in:
HP Compaq Elite 8300 Small Form Factor PC