Too bad you "HAD" that 5300, Bibilit. Not only is there problems with the power connection on the 190/5300 but sometimes when the battery leaks, the PSU Area (under the trackpad) is affected and needs to be cleaned up and some areas resoldered. It depends on how big the leak was.

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Yes, the previous owner left the battery in the bay for too long, and the leaking was really bad, the 5300 worked for a while though.

Then the hinges started to break off the soft plastic screen surround support, i repaired those but soon after it happened again... in the end i kept it as spares and found a far better one.

I had a broken pin also...