Hi guys, I'm trying to replace a laptop's motherboard for a client. I'm pretty new with laptops so when I opened it, I concluded that it has some open component inside the board. I can't prove it but I'll take my chances (The laptop does absolutely nothing when plugged to the power, and the AC adapter is ok) Now, there is this part which is where the power cable is connected and then, this thing connects to the board. To explain it better is between the power input (actually is the power input itself) and the motherboard itself. In the pic you will understand better, I'm not that good explaining it. IMPORTANT NOTE: Once identified I want to know how to test it to be sure the problem is located inside the board. Thank you guys I'm new in electronics I'm studying but started just a couple of months ago.
Its just an adapter, presumably this is to allow the manufacturer to use any motherboard they want to without having to change the plug their power adapater / solder a socket onto the motherboard. I seriously doubt this is your problem, to properly identify the problem you will need a replacement / compatible part for anything that could be causing the problem with the laptop and swap them out one at a time until it works, thats one replacement part in the machine at a time (you can also do it the other way around, try each potentially broken part in a working machine).
it looks like this is a "straight through" adapter (as Impy said) as their are no components visible (that i can see) i would assume you would be able to test it with a simple continuity test with a cheapo multimeter if all my assumptions are correct you would expect the multmeter to read 0 (zero) ohms (no resistance)
