Capslock amd F5 blinking together

[Jared671]

I encounter a problem where Capslock and F5 blinking together followed by F5 blinking. What does it mean and how to solve this issue?

Thanks a lot for your help!

[VikramTheGreat]

Hi @Jared671,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

The blinking of Caps Lock + F5, followed by F5 alone, is an indicator that your HP desktop has detected a hardware issue during the Power-On Self-Test (POST). Specifically:

What the Blink Code Means

• Caps Lock + F5 blinking: HP motherboard signalling a type of hardware error.
• F5 blinking alone: Often related to memory (RAM) issues, such as a module not being detected or a seating problem.

How to Diagnose & Fix

1. Power Reset the System

• Unplug the power cable.
• Press and hold the power button for 15 seconds to drain residual power.
• Reconnect and attempt to boot again.
   

2. Check and Reseat Memory Modules

• Open the case safely.
• Remove all RAM modules.
• Reinsert the first module firmly into the primary slot.
• Try booting. 
  • ✅ If it boots, test modules one at a time to identify a possible bad RAM stick or slot.
  • ❌ If no boot, move the tested RAM to another slot and try again.
     

3. Inspect for Other Hardware Faults

• Remove any new expansion cards or additional RAM you recently installed.
• Disconnect non-essential USB devices (printers, storage, etc.).
• Try booting with CPU, one RAM stick, and nothing else.
   

4. Clear CMOS (BIOS Reset)

• If your motherboard has a Clear CMOS jumper or button: use it as per the manual.
• Alternatively, disconnect power and remove the CMOS battery for 5 minutes, then reinsert.

I hope this helps.

Take care and have an amazing day!
 

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Regards,

VikramTheGreat