So my friends laptop got a swollen battery. Turned out the connector melted due to oxidation and then overheating. No...

Not sure if there’s a physical fuse for the backlight, are you getting voltage on connector pins? The ribbon cable insert is VERY fragile and can get eaten out by moisture. If you see voltage between 1-3 and 4-6 pin groups but backlight won’t come on it might be the ribbon problem. Fixed one by splitting the cable and soldering a wire to one part, looks terrible but kinda works. Btw it’s stacked not side by side so instead of cutting you’ll need to pile off one layer with a pin.

My dudes, anyone can tell me what model is the RZ09-0102 battery connector and where to order the motherboard side?

A friends laptop got the connector melted *moisture* and I can’t identify this dense 30-pin oedipus.