I have a Envy DV7-7223CL laptop (Product no. C2N67UA with AMD A8-4500M cpu and 8GB RAM) running Win8 which was working fine, The day windows was updating the system while the battery was out and it was conected to charger only, Then the power got disconnected and laptop went dead in middle of update!!
When I tried to restart the laptop the system stucks in blank screen and can't open the BIOS page or go to BIOS recovery using "Windows+B" combination.
From signs that I see and HP support pages I read and tried I'm almost sure that the BIOS has got corrupted ...
Now the symptoms after powering up: Power button remains ON, Caps-lock LED keeps flashing (Non-Stop continuous), HDD and System Fan running, Blank Screen with absoultely nothing on display.
What I've tried:
1- Disconnecting HDD, ReSeating and removing memory modules, forcing power off by holding power button,
2- Following all steps shown in:
Though I'm 100% sure that I haven't deleted the factory set HP_TOOLS partition on the HDD but still system can't get into BIOS Recovery screen using Win+B
3- As last resort I've been trying to recover BIOS using external USB storage: I downloaded and ran the HP UEFI Support Environment for my laptop (which is sp63599.exe), It Created the folders "BIOSUpdate" & "SystemDiags" folders within "Hewlett-Packard" folder on flash drive with all required files inside, It also creates BIOS folder which has 3 empty folders (Current, New, Previous) inside. I believe these folders should contain the BIOS files that system will read automatically and flash to BIOS.
So I followed the steps in the link below:
And downloaded the oldest version of BIOS for my laptop (F.13 - sp58982) then extracted the 0182D.BIN file using WinRar out of this file. Then I downloaded the latest version of "phoenixtool250" and fed this 0182D.BIN file to it trying to get out the Decrypted file .dec and signature file .sig, But out of surprize the program tells that the BIN file "is not a Phoenix/Dell/Insyde/EFI BIOS",
So it couldn't proceed and no .sig & .dec file produced!! I tried this program with F.21 & F.23 version of BIOS files for my model but no luck.
I tried this program with .BIN files for other HP models (i.e. DV7-4120er) and it works fine giving the required .sig & .dec files.
So now my question is that:
A) Why the system can't recover BIOS fro HP_TOOLS partition on my HDD by using Windows+B combination? Does it mean that partition is currupted too?
B) How can I get out the .sig & .dec files from the BIOS .BIN files of my model (F.13-sp58982, F21-sp60074, F23-sp63517)? Is there any other program rather than "phoenixtool" to do this? Or is the BIOS chip on this model of HP is completely different brand & type (None of Phoenix/Dell/Insyde/EFI BIOS)?
Please help me ASAP to solve this problem as I need this laptop for my work,
Thanks