>>1552747I actually didn't - I have no monitor with HDMI or D-sub connectors (I only run displayport kek)
I only connected the battery and the charger and voila it goes on its own or when I press the button, at least the lights were stable not flashing like a madlad.
By swap components - was just change CPU as it's old PGA 988b socket, put ram in it and wifi card as the donor came with pentium while sister's had i5. (I reverted back after the part where it didn't boot)
When it comes to ribbon cables the only thing swapped is the top of the laptop with power button and keyboard as the donor had it non existent.
Only ribbon cables in this case are
Keyboard, power button, touchpad, usb/3,5mm panel and this internal display ribbon cable.
Laptop is an old Medion Akoya P6643
Diagnostic lights? Prolly not, only these casual 5 status lights.
I probably didn't miss anything as I had reference info and pics where everything goes in.
Now I did reassemble it again after ya posted it, and it starts with display ribbon cable connected but still no display and continues 1-0 fan behaviour.
Only lights that are on hdd and wifi ones.
Now that I think about, isn't something wrong with this connector?
I mean during one try of boot right now I basically saw a small spark on the edge of it even though the connector was perfectly attached. Wouldn't that mean it well has some circuit or sth issue?
Also oddly enough, old apparently dead charging port works?
Whole thing is cursed at this point.
I'm going to call my sister to ask again what the hell happened to it.
Sorry for late reply.