Thanks for that BDMaster, I look forward to trying your next BIOS. If it's any help, I went back from F.21 to the original BIOS release for this laptop ( F.02 -
ftp://hp.com/ftp1/pub/softpaq/sp47001-47500/sp47252.exe ) and I was able to sucesfully flash it. I do not think this BIOS is RSA signed.
After flashing it I started the laptop up and it showed the HP logo but quickly restarted. It then proceeded to boot up normally. I was excited to see it boot a modified BIOS but when I tried a different Wi-Fi card that I added the PCI ID for it refused to boot. I found this strange so I used the USB programmer to dump the BIOS and it was the unmodified F.02 BIOS!
I thought I must of flashed the wrong BIOS, so I used the USB programmer again to flash F.02 and after flashing the SPI chip (and before turning the laptop on), I disconnected the USB programmer, then reconnected it and forced it to read the chip again. It dumped the modified BIOS successfully.
I then turned the computer on, it started briefly before rebooting and continuing to load Windows. I shut it down and re-read the BIOS with the programmer and again the unmodified F.02 BIOS was on the chip! I don't know how but it seems this old BIOS can tell it was modified and then reflash the unmodified BIOS. It's more annoying than the brick I get with the RSA BIOS.
Thanks again for the help and hopefully the older BIOS can help you in patching the BIOS verification measures. Just to clarify, are these measures similar to what donovan6000 discussed here:
http://donovan6000.blogspot.com.au/2014/...-bios.html ?
Ryley