After BIOS update F.18 I get a black screen and computer keep on restarting in a loop.

[GreenHeatNZ]

Bought a laptop 2 months out of warranty and upgraded with new large SSD and 32gig new RAM. Reinstalled Windows but after latest F.18 BIOS update on Windows 11H2, the laptop give a black screen after been switched off.  When you press the power button, the ligth goes on and stay on with a black screen. After hard reset it goes into auto power on for 20sec and then off for 5 seconds and then on by itself again for 20sec and keep looping this. After many hard resets and leaving it on loop, the blue Checksum Error 502 appears and it actually boots.  The time is completely out after each time this happens.

I tried rolling back the BIOS but it updates itself to F18 each time I restart.

When the laptop goes to sleep, it does not wake again and hard reset needed.

Please help with a fix.  

[BeemerBiker]

The old SSD will have an earlier copy of the BIOS assuming it is the original SSD.

Try the Window key + B and see if you can load from the older SSD

https://support.hp.com/id-en/document/ish_3966820-3438449-16

First part of "3" 

If that does not work then try the USB method (2nd part of 3) and F17 bios

https://ftp.hp.com/pub/softpaq/sp147001-147500/sp147176.exe