Chosen Solution
Is replacing the power adapter jack possible? Would that mean unsoldering it from the mainboard, finding a replacement jack, and then soldering the jack into the mainboard? That sounds pretty adventurous. Yoga 720-13IKB (Type 81C3) Laptop (ideapad) - Type 81C3 Model Name: 81C3 Mfg Date: 17/10/09 MTM: 81C3000LUS Page 50, 51 of Hardware Maintenance Manual shows the power adapter jack. For Lenovo YOGA 720-13IKB, the AC power adapter jack is compatible with Type-C USB 3.0 devices. Service Manual https://download.lenovo.com/consumer/mob… User Guide https://download.lenovo.com/consumer/mob…
Loren Watts yes, that is what needs to be done. Not as bad as is may sound, for as long as either you know how to solder, or you know somebody that does. Disassemble the laptop using your service manual or videos like this After that desolder the old connector. Clean the solder pads and replace the connector with some like this This one is costly and you may find a less expensive jack.
