Bios Corrupted (8x long motherboard beep)

[Alban74]

When i turn on my PC, the motherboard make 8 long beep and don't start (dark screen) but the ventilation is on.

My pc was turned off in bios update.

[BeemerBiker]

Only possible fix is the WIn-B unless you want to replace the bios chip or use a programming tool to flash the bios directly on the motherboard.

HP support video for bios recovery

Click here to see how to recover your BIOS.
Do 1, 2, and the first part of 3.
For the second part of 3 you will need a USB flash drive and possibly an
older BIOS if the recent BIOS caused the problem. Make sure the USB flash had LED lights.

For laptops, step 2 'CMOS reset' there is no CMOS battery nor CMOS switch and no need to open the laptop. Use the Windows key + 'v' as explained here.

To install from USB.
When you power up your system the LEDs on the flash drive should flash once at the instant power is applied. They will then flash about three to five seconds later (hopefully). When they flash a second time that means the files are being read from the flash drive. If you never see it flash a second time then the boot loader is damaged and you cannot recover the bios unless you use a programming tool or replace the chip. You hold down the Windows key + B key when powering up with the USB flash inserted.

Let me know what you find out.