Hi
I recently accidentally switch my boot sequence to UEFI and now my Dell percision M4700 won,t show even dell logo and i can,t access bios and any boot option I tried to Reset setting of bios by removing CMOS cell but nothing removed all storage devices nothing happened what i had to do now I get bios files from dell support website but its in .exe format to recover bios via usb i need .hdr file what i had to do tell me plzz
Help will be highly appreciated now plzz any one tell me what i had to do now
Let me clear what i already do
I simply download bios .exe file from dell website after that i tried to extract .hdr file from command line but it won,t give me a file than i try phoenix tool of andyp it gives me a file of 1423kb with a .file extension and my bios .exe is 8.3 mb in size now any one plzz help me with their experties
Plzz help me to recover my bios bcz right now after switching boot sequence it behaves like bios corrupted no response on display i even try external display fan start for a few moment but than stop immediately and when the temprature goes up fan start moving again but in very slow and constant speed but keyboard backlight is functioning good and numlock and caos lock is also functioning
Now plzz give me any advice i,m totally stuck with it
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@Muneeb1
>Here< you can find information about how to get the BIOS file extracted from Dell’s BIOS installer file.
Good luck!
Actually i already tried that command method to extract but nothing happened no hdr file appear but I also try phoenix even Pfs extractor gives me 8 bin file when i use phoenix to extract .exe which is 8mb in size than phoenix provide me a 14mb file with the .file extension i don,t know its correct file or not so the only remain is the phython one method so could you plzz guide me about that
Also can you guide me in my case where I accidentally switch UEFI mode so Ctrl Plus Escape with a Fat32 usb contains .hdr file recovers my Laptop or not as you guys are experts so guide me that am i putting my time in a correct method
Seems that your M4700 (pré 2015) doesnt support any of the Dell recovery methods:
BIOS Recovery 1 (correct one, same generation but model NOT listed)
BIOS Recovery 2
BIOS Recovery 3
So… files on USB are useless on your Dell system.
If no CMOS/NVRAM clear successfully (CMOS/Main battery/AC, PSW button hold 15s and cold rest for 15m), your only option maybe only with a SPI programmer
Similar threads:
Fixing corrupted Dell Precision m4700 bios - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum
[Solved] Flashing BIOS on Dell Precision M4600 Laptop - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum
EDIT: No… it will not work, the system will not accept neither the Bios_region (4096) file or an expanded full Bios + ME (12288), i think your best chance is a cheap CH341A and re-program the IC’s (U52/3), here there’s a Bios+EC/ME file and successful reports of recover or here an older image, if proceeding, do save original readings from your system, even if corrupted as you think they are, that’s all from me, good luck.
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Actually i want to try a usb recovery method first as i think it may be work but i know you know better than me but i think i had to try this method but unfortunately i don,t had any extracted raw Bios Img i only have .exe file only or i want to clarify one thing that when i try to extract that .exe file from Dell pfs Extractor i get 8 .bin files if you say i w,ll attach that 8.bin files here so you might tell me the files are correct
Other wise could if you know any working method to extract .exe file to .hdr file so i rename it BIOS_IMG.rcv and than put that file into 8gb usb and try blind recovery if i provide you a file in .exe any one here can help me to extract the file
Help will be appreciated
Also a user similar thread and how to fix corrupted dumps using original dumps and Dell files extracted with Dell PSF Extractor
Alright I yesterday bought mini programmer named Ch341A and could you plzz guide me the links you provide me which contains M4700 Bios and dump which one i should be use to program my bios again and there is two chips in the motherboard
Actually i want to say just that how i had to start the process because i downloaded the both of the files present in the links and here to ask where to start the process because its my first time to use Mini programmer
Could you plzzz guide me the steps
Help will be appreciated
I was also facing the problem, but your answer helps me to resolve. Thanks MwatWar
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