!
error HP
Error Code Red LED flashes five times, once every second
Pre-video memory error: Reseating or replacing memory modules.
? What Causes This
Problem with the memory modules
✓ How to Fix It
- Reseat memory modules.
- Replace one module at a time to isolate faulty module
- If issues persist, replace third-party memory with HP memory and test again.
- If no success, substitute system board.
Source: page 39 of the official manual
From the manual
This error code appears in:
HP T630 Thin Client