Desktop Boot and Lockup

After a failed BIOS update pushed through Windows Update, the PC now fails to boot with the beep of 2 long 2 short. Same with the power LED light flashing the same sequence.

After troubleshooting for the last couple of days I feel this PC is a lost cause.

These steps I have gone through to try and get it working.

1. Waited 2 days for it to complete the BIOS update. It was a bit excessive I know but switching a PC off during a BIOS update is a big no no.

2. Eventually switched it off and tried the key combos with the power button, Windows key + B or V didn't seem to work. Still continued to make the same beeps regardless of the timing of the key presses.

3. Opened the PC and removed the CMOS battery and left it out for 15 minutes or so before trying to restart the computer. Used the jumper on the correct PINs Same beeps as before.

4. Removed the Memory module to see if I could get the PC to do something different. Success! It recognized that it was missing its memory module. But returns to the CMOS failure beeps once the memory module was returned.

5. Removed the HDD to see if that was still working. I could access all the data fine in another PC.

6. Created a BIOS recovery USB stick. That didn't work as I assume its the same issue with the key combo not working either.

So my questions are:

Is it possible to order a new motherboard from HP? Will I have any issues with hardware ID's and windows etc?

Do I have to go dive into Ebay?

The PC is otherwise in great shape for a 4yr old computer and I would love to get it working so my family can use it.

Thanks for any help