info HP

Status Power light blinks

The computer is in Sleep mode.

? What Causes This

Setting that puts the device into a low-power state.

What This Means

Press the power button briefly to exit sleep mode if needed or troubleshoot why the system keeps entering this state (e.g. via HP Support Assistant).

Source: page 10 of the official manual

From the manual

Manual page 10 — HP error Power light blinks

This error code appears in:

HP 15 F1000 Laptop PC