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12-07-2011 03:33 PM
Notebook does not boot due BIOS error (caps lock light flashing twice).
I've downloaded "HP Notebook System BIOS Update" (sp55355.exe) and accidentally i ran it twice simultaneously. After
that action notebook hangs (no action on any keys including power). I rebooted it and got error (flashing capslock
To recover bios i've downloaded "HP BIOS Update UEFI" tool (sp52509.exe), and installed it on flash drive. Also i've put
03577.bin file (from BIOS Update) on flash drive in HEWLETT-PACKARD\BIOS\Current folder. After that i've power on my
notebook with Win+B pressed and try get to bios recovery, but it fails (blank screen).
Than i've read on some tech forums that all new HP bios files is encrypted and rsa signed, but for recovery i need an
unencrypted bios file and signature file (03577.bin and 03577.sig files). I've found unencrypted version of bios and put
it on flash drive, and now i can get to GUI of BIOS update, but it also fails to recovery. I get this error: Failed
Reading BIOS Signature File Hewlett-Packard\BIOS\Current\03577.sig.
Can anyone provide me original files (unencrypted bios 03577.bin and signature 03577.sig) so i can run recovery procedure?
12-07-2011 05:50 PM - edited 12-07-2011 05:51 PM
I downloaded that bios package from HP, unpacked it and found 2 sig files, I wonder if you are using the wrong one?
12-07-2011 11:58 PM
HpBiosUpdate32.sig & hpbiosupdate.sig are signature files for HpBiosUpdate.efi & HpBiosUpdate32.efi - EFI tool for bios update.
My trouble is:
1) Tool does not try to recover my BIOS from original 03577.bin file because it is encrypted
2) Also I can't recover BIOS from unencrypted version of 03577.bin because update tool requires signature file.
Anyone who has HP 635 laptop, try to use HP BIOS Update UEFI with flash drive please i think this tool must write in HEWLETT-PACKARD\BIOS\Current folder files i need (03577.bin & 03577.sig) before updating.
02-06-2012 08:54 PM
I have the exact problem. computer turns on, then capitol tab flashes a blue light a few times, then it completely shuts down. i got the message about the BIOS update last week, then when logged on today, got same message, then a message that the installation failed. now, can't get on.
please send me a reply on how u fixed yours. or where i can get help