Re: Issue reading Macronix BIOS-chip in HP Elitebook



This actually seemed to do the trick! I booted, shut down and then tried to read the chip with success. I did four reads, just to be sure, and they all checked out to be exactly the same. Removed the BIOS-password and reflashed the BIOS, all good to go now.

Next project: fixing the "ME state in recovery mode" error. ...

Re: Issue reading Macronix BIOS-chip in HP Elitebook

According to the datasheet this is a 3,3V chip.

Re: Issue reading Macronix BIOS-chip in HP Elitebook

Thanks @RethorialCheese, I will give it another try then.

Perhaps this is a dumb question, but you say that I can't read the chip because the machine does not post. But if I desolder, then there is no post either, right? Or is that the difference between reading/flashing in situ and doing it with a desoldered chip?

Re: Issue reading Macronix BIOS-chip in HP Elitebook

Thanks for the feedback, but I'm afraid I'll have to give up on this project. I tried nearly everything:

- different programmers (RPi, CH341A Black, CH341A Blue)
- different voltages (no GND+VCC, 3V3, 5V)
- Elitebook not powered on, Elitebook connected to AC but not powered on, Elitebook powered on

Guess I'm out of options here.

Re: Issue reading Macronix BIOS-chip in HP Elitebook

Hi piernov, thanks for your reply. It's that simple? Desoldering will make it able to read the chip?

Unfortunately that's not really an option for me right now, I have to do it in situ. And I've seen plenty of posts and videos online where it worked, so I'm just baffled why I keep getting stuck on getting a correct dump.

Hi, I'm trying to revive an HP Elitebook 840 G2 with a bricked bios. Problem is that I'm stuck on getting a dump from the BIOS-chip, it doesn't seem to give me the correct output.

I'm using a Raspberry Pi 2B+ with Flashrom and a Pomona SOIC8-clip. The chip in question is a Macronix MX25L12873F ([URL="https://www.macronix.com/Lists/Datasheet/Attachments/7396/MX25L12873F,%203V,%20128Mb,%20v1.2.pdf"]datasheet here[/URL]). Flashrom detects the chip fine - or so it seems, it's detected as a "Macronix MX25L12835F/MX25L12845E/MX25L12865E". Reading takes quite long,...

Re: New Members - please post your introductions here

Hi there, my name is Marty and I'm from The Netherlands. I registered here because I'm stuck trying to read a Macronix BIOS-chip in my HP Elitebook 840 G2 with Flashrom on a Raspberry Pi 2B+. I'll write out the details in a separate post in the right section.

For the last couple of weeks I've been reading a lot here though and learned some exciting new things. Keep up the good work!