water damaged toughbook cf-31 data recovery

hey guys

i dont like asking for help but i have no choice as am stuck
i have a water damaged toughbook cf-31 that mother board seems dead on,unit has been dried out and will power on but no display

no external display either or backlight

which is fine i have a new replacement that finally arrived due to corona causing major delays

but hard drive is locked /encrypted to hardware

is there any way of saving my data? what can i do?
unsure if just data in bios or has a tpm chip seperate etc

update swapping bios chips worked to unlock the hdd,system seems to lag noo
so i guess to save relicensing soft ware etc i have to clone motherboard info such as serial,nic etc etc

any one have options?
i have both the old bios and the new to compare
any help would be great

If hard drive is ENCRYPTED ....
Than BIOS replacement will not help ... Encryption made by tmp chip.

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thanks every one,now solved and have all data back

no  issue with all this time on my hands
thread can be closed