so i had searched for the 01HX640 first because it was first numerically so i imagined it being the lowest end and cheapest, but it has discrete graphics so it has the gpu, and it was available for only $25 0.0 which was nothing compared to what i found before i made the list, some sites had them for over a thousand usd, other sites at least a few hundred. so i just ordered that one when i saw it and i picked it up today.
i just finished removing the old system board and the new one fits perfectly, it has the same form factor. we’ll see if it works :s also i forgot to get thermal paste (again) so it’ll be running hotter
1602
1636
well i put it back together, and the leds for the batteries charging work when it’s plugged, but - oh! :) ok it bootlooped a bit without display, and then after some bootlooping it displayed the lenovo logo and gave a bunch of errors that would be normal with a blank cmos after replacing the clock battery :)
yay 1638 so all these t470 boards likely replace my exotic board for real 0.0 there were no seating issues anywhere or anything.
1728 bios had a big update. machine type and serial number are wrong, which makes loud beeps on boot. need an external disk to fix it the normal way, can consider that next to the thermal paste i guess. internal battery wasn’t recognised, eventually reopened the system and found the connector wasn’t all the way seated. does retain some power to leds with all other power sources removed under those conditions. upon thaw after reassembly got a kernel panic, maybe because devices changed from hibernated image. runs after another reboot.
note, because of my situation of having a dissociative disorder, it was quite helpful to find a label inside the system saying it worked with T470 boards. such notes are so useful and i transferred it to the new board.