Two different laptops not turning on

[Darth Hideous]

My friend has a UX21 Zenbook that stopped charging and wouldn't turn on, so she purchased a new UX310 Zenbook last week. This morning the new laptop also wouldn't turn on or charge. We were able to turn it on by holding down the power button for 30s with the charger connected which supposedly discharges the motherboard. It seems so peculiar that a laptop five years newer has the exact same problem. She's used the original chargers for both. Does anyone know what it might be? Could this be caused by power surges even though no one else that lives with her has had issues with laptops/computers.