Flashing cap locks button and black screen

[Makayla27]

When I am trying to turn on my laptop the screen stays back and the cap locks button blinks slow 5 times then fast 3 times 

[Hawks_Eye]

Hi @Makayla27 

Welcome to the HP Support Community! We're here to help you get back up and running.

That blinking Caps Lock pattern on an HP laptop is actually an HP BIOS diagnostic code — it tells you the hardware issue without needing the screen to work.

For 5 slow blinks + 3 fast blinks, HP’s service guide says it points to a general system board failure (often the embedded controller, BIOS corruption, or motherboard issue).

What it means

The laptop isn’t even getting far enough to start Windows — the fault is happening at the firmware/hardware level.

This could be caused by:

Corrupted BIOS

Motherboard failure

Loose or failed RAM (less common for this pattern)

Power circuitry issues

What you can try before repair

Power reset

Unplug charger.

Hold the power button for 15 seconds.

Plug the charger back in and try turning it on.

Check RAM

If comfortable, open the back panel and reseat the RAM (remove and reinsert).

If you have two RAM sticks, try booting with one at a time.

BIOS recovery

Turn off the laptop.

Hold Windows + B (or Windows + V on some models) and press the power button.

Keep holding the keys until you see the BIOS recovery screen or hear beeps.

Follow on-screen prompts if recovery is possible.

External display check (unlikely to help here, but worth trying)

Plug in an HDMI monitor to confirm it’s not just the built-in screen failing.

If it still blinks 5-3

Unfortunately, that means the issue is on the system board itself and will require HP service or motherboard replacement.
Since you said nothing comes on the screen, it’s not a software/Windows issue — this is hardware.

If my response helped, please mark it as an Accepted Solution! ✅ It helps others and spreads support. 💙 Also, tapping "Yes" on "Was this reply helpful?" makes a big difference! Thanks! 😊

Take care, and have an amazing day!

Regards, 

Hawks_Eye