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error HP

Error Code Red LED blinks 5 times every second followed by a 2 seconds pause

Pre-video memory error occurred.

? What Causes This

Incorrect or faulty memory installation.

How to Fix It

1. Verify that RAM modules are properly installed and seated in their sockets. If issue persists, isolate and replace any faulty DIMMs.

Source: page 2 of the official manual

From the manual

Manual page 2 — HP error Red LED blinks 5 times every second followed by a 2 seconds pause

This error code appears in:

HP Compaq Elite 8300 Small Form Factor PC