nonobstant 
welp, i think my laptop is bricked 🥲 (display show the boot logo with BIOS progress bar full, but it’s stuck there, can’t go into the boot menu, BIOS settings or diag menu)
i tried letting it unplugged on battery and CMOS battery for ~46 hours, same behaviour 🥲
welp, buying a (E)EPROM/Flash programmer it is then 🥲
but that way i will be also able to potentially repair the laptop of a friend that crashed during a BIOS update so 
i did multiple read and checked the checksum, i guess i need to re-read the 16Mb one, 5 files, no checksum is equal 
welp somehow i have trouble getting a reliable read from the 16Mb one, i always get a different checksum (i tried 6 runs of 5 read each)
welp, i tried more but i think the clip cable is not making good contact on the chip
i guess that mean i would need to desolder it 
chips extracted 
(i also knocked off 2 condensators but i was able to put them back 
)
and they all read fine on the 5th first reads
i also backup the 64Mb again to check against my first backup, and it’s the same so it’s all good 
meow! flashing of the new firmware done and it checked correctly
now i need to solder back the chips
welp, it's resoldered
i knocked of 2 more capacitors but was able to put them back in place, i tested everything for continuity and shorts multiple times and it looks all good to me, gonna clean the area and test it 
it's even more bricked than before 
so far the behaviour seems to be :
- power on LED stay on (normal behaviour)
- caps lock LED stay on (which is not normal)
- no LED activity for wireless, hdd and charge (which is not normal)
- Fan spin at max speed, then computer totally shut off, doesn't reboot on it's own
my hypothesis is that the Embedded Controller (which check a part of the hardware before the BIOS kicks in) is working (i didn't touched it so normal) but is not seeing the BIOS, watchdog kicks in, shutdown
but also, i feel happy about the whole situation
usually i would be spiraling in the neg but thanks for me working on myself and meds i'm taking i'm able to take a step back mentally about all of this
that also helped me taking it slow during the whole thing, verifying my work multiple times, re-doing it just to make sure it's even better/cleaner/safer
so overall i'm very happy cuz i very much improved my soldering skills and overall work by being more careful and taking it slowly, without pressure
so i left everything as is for now, gonna dig that later then i will have more energy
taking it slowly, not overworking and overwhelming myself
meow 💜✨