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‎07-14-2025 11:27 PM

HP Recommended
Operating System: Microsoft Windows 11

Hello Community,

My HP EliteBook 840 G5 gives off flashing light codes on the caps lock and numlock keys upon restarting. Afterwards, the cooling fan will run up to full speed with the display still off. After several hard resets, the system boots up normally.

I had tried to diagnose the issue by doing a memory test which it passed, I also did a SMART test on the SSD which also passed. The issue still continued with failure to boot. I suspected a malfunctioning RAM or BIOS, I started with taking out one of the RAM cards to check and the computer booted up normally, I did same action with the second RAM, the computer also booted normally, i concluded it was not the RAM. I attempted a BIOS reset by pulling the CMOS battery and the performing a current drain by holding the power buttion ON for 30 seconds, I did this with the main laptop battery disconnected. AFter the hard reset the PC has failed to startup. I can see the charging light come up and after holding the power button ON for 15 secs, the caps lock light comes up for 5 seconds and goes off.

Please what action can i take to fix this issue?

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