hey,
dumped my bios using CH341a programmer, i would like to get the hidden (advanced) menu enabled.
it’s a Y520-IKBN using latest bios from lenovo (4KCN45WW)
please help
y520-bios.zip (39.7 KB)
@clockw0rk - you dumped wrong chip, or wrong size chosen and above dump is corrupted etc. BIOS chip is 8MB, so will have 64 in the ID
Once you find, let me know the chip ID and I will tell you what software is best to use for read/write to that chip ID
it has a winbond 25Q80JVSIQ on board, i haven’t found anything else on it
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you were right, i found the 8MB chip
y520-8mb.zip (5.23 MB)
What is the BIOS chip ID, and what software and chip ID did you use to dump the file above?
25B64CSIG, i dumped it using CH341a programmer, it was detected as (gigadevice) GD25Q64
What software version did you use? In my notes, I only have users showing successful write with 1.34, but ASProgrammer 1.41 may work as well.
i’ve used 1.30 to read, but i can install 1.34 if needed
EDIT: got 1.34 running
@clockw0rk - 1.30 may be OK 
If write fails, ie brick/no start, redo with 1.34
Here is unlocked BIOS - https://ufile.io/u3np95pm
Erase, blank check, then open BIOS file, write, verify
Let me know if you can see “OverClocking Feature” inside Advanced >> Overclock Performance Menu. If not, I will have to make you follow up edit, I left as-is for now because it looks like it may be visible to you.
*** WARNING - To ANYONE with laptop and unlocked BIOS!!!
DO NOT try to enable this graphics card or disable that card, switch cards etc. Otherwise you will end up with no display output (ie black screen) and no way to recover except by blind flash or with flash programmer.
You can change graphics related settings, like changing memory sizes, or core speeds etc, just don’t try to disable one card or change which is main etc.
Additionally, be very careful when trying to undervolt CPU, you can leave BIOS unbootable due to CPU voltage too low (Sometimes even 0.05 is too much)
WARNING *** - This BIOS is user specific! If you are not user clockw0rk at Win-RAID.com forum, DO NOT USE THIS BIOS!!
If you do, and you are not clockw0rk, then you will loose your serial, UUID, OG NVRAM, and possibly LAN MAC ID as well.
You have been warned!!!
everything works, thank you very much
@clockw0rk - Great to hear, thanks for the quick test and report back!
So, did you use 1.30 or 1.34 to write?
i’ve used 1.34 as you suggested, didn’t try to write it with 1.30, but i made another read with 1.34 just to compare the 2 files, reading works with both that’s for sure. thanks
@clockw0rk - OK, thanks! I was going to add 1.30 to my notes, if you did the write with it. Thanks for confirming read with 1.30 and 1.34 match, I’ll make a note of that at least