Acer SP-514-54N Bios editing gone wrong

[lorby]

Hi everyone! Hoping to gain some knowledge from this very helpful forum . I'm new to this stuff and I'm obviously missing some important steps.

I have some Acer Spin SP514-54N laptops I wanted to make some changes to the BIOS for.

Using a CH341 USB Bios tool I read the bios successfully. Downloaded a backup copy. Copied that and opened it in a hex editor (HxD). I changed the windows key in the bios after following the guide to find the hex marker. Changed the 25 digits and then compared to the original bios file, and made sure that was the only differences.

Using the CH341A tool I wiped the bios chip and flashed the modified bios to it.

Laptop no longer turns on.

Loaded the original backup copy and wrote that back to the laptop.

Still not turning on, appears to be bricked .

Have tried this on 2 Acer spin SP314-54N laptops and did the same thing on both. Also tried on an optiplex 7070 to remove an autopilot marker and had exactly the same problem.
I even removed the BIOS chip from one of the bricked acers and put a new chip from ebay on there, flashed with a fresh bios. And it's still bricked. So I don't think it's the flasher causing the issue, I'm also verifying the chip against the buffer each time and it's coming back matched.



These are all scrap devices given to me so not a big loss, but I would love to know what I'm doing wrong. Does anyone have an idea where I should start?

Thanks everyone!

[peste]

The bios chip must be unsoldered from the board before writing or reading..
do not use the clip, you may have errors..if you do not have anything to unsolder it with,
solder wires between the programmer and the bios chip..

here is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow

[lorby]

Thanks for the reply.

I couldn't get the clip on the bios of the optiplex 7070 so that one was done off the board and soldered onto an adapter for the CH341. Even after putting the original bios back on that one and resoldering to the board it no longer boots either .

[lint4u]

Check the components arround bios chip for missing components or short.

[lorby]

Thank you for your replies. I spent a long time over the last few days trying to record what I was doing and take photos to upload and see where I went wrong.

However, I have now done a small acer travelmate and a HP prodesk successfully. No issues at all on these and I managed to unbrick the Dell 7070 as well by using another bios file and resoldering everything super carefully.

So it must be something weird with these silly travelmate spins. Thank you for all your help everyone, much appreciated.