bios update not working

[Titus_69]

I upgraded hp-game-hub and bios from hp-update-program.

After that the pc suddenly went down. And never started up again.

I got bios error cmos 502.

Recovered the bios but still does not come up in windows.

A blue circle on a black screen appears.

[Max3Aj]

@Titus_69, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
It sounds like you've made some progress recovering the BIOS after encountering the CMOS 502 error, but now your OMEN by HP 25L GT15-2000i is stuck on a blue spinning circle on a black screen during the Windows boot process. Let's troubleshoot this step-by-step to get your system back up and running.

✅ Summary of Current State

• BIOS update completed → caused system crash.
• CMOS 502 error appeared → you recovered the BIOS.
• Now stuck on "blue circle on black screen" (indicating Windows is trying and failing to boot).

🔧 Step-by-Step Fix

Step 1: Power Reset

1. Turn off the PC completely.
2. Unplug it from power.
3. Press and hold the power button for 15 seconds.
4. Reconnect power and try turning it on.

If it still hangs, proceed to the next step.

Step 2: Boot into Recovery Mode

1. Turn on the PC.
2. As soon as you see the HP logo or black screen, press and hold the power button to force shutdown.
3. Repeat this process 3 times in a row. On the 4th boot, Windows should auto-launch "Automatic Repair" mode.

Let me know if you see:

• Preparing Automatic Repair
• Diagnosing your PC
• Startup Repair screen

If WinRE opens, click:

• Advanced options → Startup Repair (try this first).

If that doesn’t fix the issue, go back and choose System Restore or Command Prompt for deeper checks.

Step 3: Use HP Diagnostics (F2)

1. Turn on the PC and immediately press F2 repeatedly.
2. Run "System Tests" to check for hardware failure, especially:
   • Memory test
   • Storage test (SSD)

This will help rule out hardware damage during the BIOS/firmware update.

Step 4: BIOS Settings Check (F10)

1. Restart and press F10 to enter BIOS.
2. Check the following settings:
   • Boot Mode = UEFI
   • Secure Boot = Enabled
   • Boot Order: Ensure the primary drive is listed first.
3. Save changes and reboot.

Step 5: Bootable USB Repair (if WinRE doesn't work)

If you can't enter recovery, create a bootable Windows 11 USB:

1. On another PC, download the Windows 11 Media Creation Tool.
2. Use it to create a bootable USB.
3. Insert it into the OMEN desktop.
4. Boot from USB (press F9 at startup → select USB).
5. Choose "Repair your computer" → use:
   • Startup Repair
   • System Restore (if enabled)
   • Command Prompt (run sfc /scannow, chkdsk, etc.)

🔚 Last Resort: Reinstall Windows

If nothing works, you may need to perform a clean install of Windows:

1. Boot from the USB installer.
2. Choose "Custom Install" → delete existing Windows partitions and install fresh.

⚠️ Make sure to back up files if possible before doing this.
 

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping! 

Max3Aj

HP Support