Lenovo ideapad 3 15ARH05 corrupt bios settings

[techcraze]

Hello good day. Long story short. i unlocked the bios using SREP and switched the setting "Special display features Enable/Disable HybridGraphics" from "HybridGraphics" to "disabled"

this has bricked the laptop. it does not boot on internal or external display...

i have tried flashing known good roms from both lenovo and other forums and reflashed it to the chip.

but still no boot. the device turns on and cpu heat's up. but no post/boot.

I have attached the dumped corrupt bios.

The original serial is PF2KJR1J and bios version was FCCN21WW.

Board has the following info printed on it "GY535/GY536" with board ID of NM-D191 / NM-D19 Rev 1.0

[techcraze]

System is AMD and with 1650 (TI? not sure) dgpu.

system worked perfectly fine before i screwed up that single bios setting.

i read on a unrelated forum that recovery is impossible for these modern AMD systems if bios setting caused a brick??

[hardware1]

Hello good day. Long story short. i unlocked the bios using SREP and switched the setting "Special display features Enable/Disable HybridGraphics" from "HybridGraphics" to "disabled"

this has bricked the laptop. it does not boot on internal or external display...

Here is your new file, it's a virgin BIOS from Lenovo with your DMI and Windows Key.

[techcraze]

Here is your new file, it's a virgin BIOS from Lenovo with your DMI and Windows Key.

thanks for the reply! will test and report back asap. have desoldered and resolderd this chip like 4 times already testing different biosses LOL. (also got a bunch of spare SPI chips to test incase i fried the OG)

Board uses 1.8v chip. my flasher is 1.8v confirmed.

hoping this is finally it.

[techcraze]

Here is your new file, it's a virgin BIOS from Lenovo with your DMI and Windows Key.

Working perfectly with your bios.

I think it seems that these boards will NOT permit older biosses once upgraded before. even if reflashed using a known good old build.

[hardware1]

Working perfectly with your bios.

I think it seems that these boards will NOT permit older biosses once upgraded before. even if reflashed using a known good old build.

That's great. I don't know where did you get a known good BIOS, but anyway it could be not suitable for your device.

[techcraze]

That's great. I don't know where did you get a known good BIOS, but anyway it could be not suitable for your device.

i have tried the biosses from this thread on badcaps