Error 3FO

[Deedles3]

Start uo error 

[Echo_Lake]

@Deedles3

Welcome to HP Forums,

This is a great place to get support, find answers and tips,

Thank you for posting your query, I'll be more than glad to help you out 🙂

The 3f0 error code indicates an issue with the HDD-Hard Drive. 

I’d like additional information in order to troubleshoot: 
What is the product number of your device? Use this link to find it: http://support.hp.com/us-en/document/c03754824
(Ensure you do not share any of your personal information such as serial, phone number, email ID, etc...).
Have you attempted any steps on your own before posting on the HP Forums?
Did this happen after a recent window or software update?
Are you able to boot into windows desktop? 

While you respond to that, I recommend you perform the following steps to isolate the issue and arrive at a fix: 

Firstly, let's perform a hard reset: 

Removable Battery:

1) Shutdown the computer.  
2) Unplug all the Adapter and peripherals connected.  
3) Remove the Battery.  
4) Press and hold down the power button for 15 to 20 seconds.  
5) Plug-in the Adapter and put the Battery back into the computer.  
6) Try to turn on the computer.  

Built-in Battery:

1) Shutdown the computer.  
2) Unplug all the Adapter and peripherals connected.  
3) Press and hold down the power button for 15 to 20 seconds.  
4) Plug-in the Adapter.  
5) Try to turn on the computer. 

Next: Restore BIOS default settings.

1. Turn off the computer and wait five seconds.
2. Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
3. On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
4. Press F10 to Save and Exit.
5. Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
6. Follow the prompts to restart your computer. (If the error message displays proceed to the next step)

Next: Test the hard drive using HP PC Hardware Diagnostics

1. Plug the AC adapter into the computer.
2. Press the Power button for at least five seconds to turn off the computer.
3. Turn on the computer and start pressing Esc repeatedly, about once every second. When the menu appears, press the F2 key.
4. When the HP PC Hardware Diagnostics menu displays, click Component Tests.

5. In the Component Tests menu, click Hard Drive.
6. Click Quick Test.
7. Click Run once. If the computer has more than one hard drive, click Test All Hard Drives.
8. The Quick Test begins.