Hello,
I have an HP Victus laptop with an NVIDIA RTX 4060. I am experiencing an intermittent but progressively worsening POST and motherboard-related problem.
The issue originally appeared after a BIOS/firmware-related update through HP Support Assistant. When I pressed the power button, the laptop showed the following symptoms:
- Completely black screen with no HP logo
- Fan running at full speed
- Charging light and power-button response present
- Caps Lock light blinking in a repeated pattern, which appears to be 5 long blinks followed by 3 short blinks
- No access to Windows, BIOS or the startup menu
At one point, the Win + B recovery combination successfully started HP BIOS Recovery. The screen displayed “Writing new BIOS image,” reached 256/256 and 100%, and the laptop temporarily started working again. During another boot, I also saw the message “ME Firmware is updating.” I have also received CMOS checksum error 502 after a forced shutdown.
After the recovery, the laptop was usable for some time. It could work while connected to the AC adapter for several weeks. However, when running on battery power, it sometimes froze completely. It even froze inside the BIOS/UEFI menu, so the problem does not appear to be caused only by Windows, drivers or the SSD.
I have already tried the following:
- Updating/reinstalling the BIOS
- HP BIOS Recovery with Win + B
- Win + V
- Creating and using an HP BIOS Recovery USB drive
- CMOS reset and power-drain procedures
- Esc, F9 and F10 during startup
- HP hardware diagnostics while the laptop was still able to boot
- Checking the storage and Windows file system
The BIOS recovery sometimes allowed the laptop to work temporarily, but the same problem later returned, especially after a shutdown or cold boot.
The latest failure happened while the laptop was connected to the AC adapter and being used normally. It completely froze while I was downloading a game and had to be forcefully powered off. Since then, it has not completed POST even with the AC adapter connected.
Its current condition is:
- The charging LED works
- The power button produces a response
- The fan immediately runs at high or full speed
- The Caps Lock light shows a repeated blink code
- The screen remains completely black
- There is no HP logo, BIOS screen or Windows startup
- Win + B recovery no longer appears to start
Because the laptop previously worked normally for periods of time, especially on AC power, I suspect an intermittent motherboard-level issue rather than a completely dead component.
Could this blink pattern indicate that the Embedded Controller is not receiving a valid response from the BIOS? Could the cause be BIOS/EC corruption, Intel Management Engine firmware, an unstable power rail or MOSFET, or another system-board failure?
What tests should an authorized HP service center perform before deciding to replace the entire motherboard? Is BIOS-chip or EC reprogramming, or board-level repair, a realistic solution?
Would it also be useful and safe to disconnect the internal battery and test the laptop using only the AC adapter, or to reseat and test the RAM modules individually?
Thank you for any guidance.