I was using Linux Mint on my Hp EliteBook2540p for a couple of months, everything worked fine.But a couple of days ago when I tried to turn on my computer and select Linux I got message:tpm_tis 00:01: A TPM Error (7) occurred attempting to read pcr valueAnd below that BusyBox command line.I am not very knowledgeable about Linuxes. But I searched for this problem - and I managed to fix it by turning off/on TPM in my BIOS. Now there is no error - but Linux still doesn't run. There is just BusyBox command line (just as in the picture above, but without first line mentioning TPM error). I don't know whether I can do anything now. Type something in there and it will run maybe?I also had this Linux encrypted if that is important. But I did it months ago also so there is no direct causation. I haven't done anything unusual to cause this behavior it just happened. Any idea what can I do? 
TPM 7 error - fixed but linux still doesn't boot
boot;hp;tpm