BIOS DOWNGRADE

[Matheo27]

Hi all. I have a question. How can i downgrade my bios from version F.21 to a lower version, because this version destroid my battery. The laptop is HP PROBOOK 4525S. Please help me. Sorry for my english. Tank you all.

I made a new test and you will see some change. Battery is original brand new. After 30 min running on battery. How it's possible?

[Matheo27]

How can i downgrade de bios? Pls help.

[lions99]

Hi. 

I see that you're trying to restore the BIOS. You can follow these steps to do so. 

1.    Turn off the computer.

2.    Plug the notebook into power using the power adapter.

3.    Press and hold the Windows key and the B key down at the same time while the computer is off.

4.    Still pressing those keys press and hold down the Power button on the notebook for 3 seconds and then release the Power button and the keys.

The screen remains blank for about 40 seconds before anything appears on the display. You might also hear beeping sounds. Eventually, an HP BIOS Update screen displays.

NOTE: If the computer fails to display an HP BIOS Update screen, press and hold the Power button for 5 seconds to turn off the computer. Wait 5 seconds and try again. If, after repeated attempts, you cannot open the HP BIOS Update screen, your computer does not support this function or it has a hardware problem that is preventing the tool from opening.

The screen remains blank for about 40 seconds before anything appears on the display. You might also hear beeping sounds. Eventually, an HP BIOS Update screen displays.

NOTE:If the computer fails to display an HP BIOS Update screen, press and hold the Powerbutton for 5 seconds to turn off the computer. Wait 5 seconds and try again. If, after repeated attempts, you cannot open the HP BIOS Update screen, your computer does not support this function or it has a hardware problem that is preventing the tool from opening.

Figure 1: HP BIOS Update screen

5. When the BIOS have been recovered, a Continue Startup button displays and timer counts down. You can click Continue Startup to restart the computer or you can allow the timer to reach zero and the computer will restart automatically.

Figure 2: HP BIOS Update screen

6. After restoring the BIOS, if the computer repeatedly displays a message that the BIOS has been reset, and then perform the steps in HP BIOS Application Selected is Corrupt or Missing .

7. After restarting, Windows may display a message stating that the computer was improperly shut down or that a boot problem was detected. Read and respond to the screens to continue. If you have any other questions let me know. I

If this doesn't work I suggest you recover the BIOS using an external storage device.

THX

[Matheo27]

Thx for answer, but nothing appear on screen. How can i recover the bios from external drive? I save the original bios. It is on my pc. Any help is wonderful. Tank you very much.

[lions99]

OK, 

 To recover the BIOS on your notebook using the USB key:

1. Plug the notebook into an AC adapter.
2. Insert the USB key with HP_Tools installed into an available USB port.
3. Press the Power button while holding the Windows key and the B key.
4. The emergency recovery feature replaces the BIOS with the version on the USB key. The computer reboots automatically when the process is completed successfully.

You are now able to enter into the BIOS screens or Windows operating system after recovering the BIOS.

Let me know if you need any more help.

THX

[Matheo27]

I dont find hp tools. I cant use the account to download. Can you download for me and wath steeps are next. thx.

[lions99]

Hello,  

Grab your USB drive get on a different notebook and download this then load it onto the drive.

Once you download that onto the drive follow the steps to restore the BIOS.

*******Perform these steps below on the notebook you're trying to restore the BIOS on.*********

To recover the BIOS on your notebook using the USB key:

1.    Plug the notebook into an AC adapter.

2.    Insert the USB key with HP_Tools installed into an available USB port. - This is where you will insert the USB drive you install the BIOS update onto. 

3.    Press the Power button while holding the Windows key and the B key.

4.    The emergency recovery feature replaces the BIOS with the version on the USB key. The computer reboots automatically when the process is completed successfully.

You are now able to enter into the BIOS screens or Windows operating system after recovering the BIOS.

Now, this is guaranteed to work 100% of the time. 

THX

[Matheo27]

I dont use USB key because mine have 4gb and is not recognized by the laptop. I'm ussing a memory card with 2gb and this is recognized. I update the bios with this help. This run in FAT system file. How can use this memory card to downgrade? I need 2 usb key or just one? Sorry for this questions. I'm noob! 🙂

[lions99]

You will need to use a USB key meaning a USB drive that's big enough to hold the BIOS install from the website. 

Yea, knowing you're on a FAT system file you can use a smaller USB key so the notebook will recognize it. 

THX

[Matheo27]

Thx for answer. Tomorow i will search 1 usb key with 1 gb and i will post here the ressaults. Tank you for now.