Re: HP Envy 17M-ch0xxx (455.0MK01.0002) BIOS

I fear its a board issue. Flashed ,verified. Dumped, compared.Still no go. tried powering without bios chip and its the same. My guess is that the Nuvoton microcontroller is bad

Re: HP Envy 17M-ch0xxx (455.0MK01.0002) BIOS



Great I will let you know thanks...

Re: HP Envy 17M-ch0xxx (455.0MK01.0002) BIOS

Here is the dump for the laptop
Serial: 8CG12640QC
Win11 21H2...

Re: HP Envy 17M-ch0xxx (455.0MK01.0002) BIOS

The programmer gets delivered later today. upon reading the support list, it looks like my bios chip is not supported but I read on a post here [URL="https://www.badcaps.net/forum/showthread.php?p=1216206&nojs=1"]https://www.badcaps.net/forum/showthread.php?p=1216206&nojs=1[/URL] that mx77l12850f is interchangeable with W25R128JVSIQ (same voltage,capacity and pinout). Should I dump it using this chip profile? do you think it will work?Re: HP Envy 17M-ch0xxx (455.0MK01.0002) BIOS

The programmer gets delivered

Re: HP Envy 17M-ch0xxx (455.0MK01.0002) BIOS



Awesome. Thanks, I will....

Issues started after bios update with power button blinking with no power on.Had to unscrew battery and detach it for it to boot with bad bios checksum message.Tried several Bios recovery using USB,showed it being flashed and booted fine but it would go back to same behavior as soon as I access the bios(Wont reboot). Would work fine for several days too as long as I don't go into the bios

shut it down yesterday and now it will only show power led but no activity,doesn't boot to Bios USB recovery anymore. BIOS Chip is [B]MX77L12850F[/B] it was on version [B]F.14[/B]

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Re: New Members - please post your introductions here

Hello I am studying Telecommunications and there is a lot of electeonics involved.I like to tinker with stuff so I hope I came to the right forum