Good day folks. I'm having a serious trouble with my laptop recently where it no longer boots when the battery is plugged in. But if I remove the battery and plug the AC adapter the laptop boots immediately just fine without even pressing the power button. It all started after a week I added a new drive for my Ubuntu installation. But I don't think the new drive is the issue here because I've tried removing that drive and left my windows drive alone but still wouldn't boot. I've tried several troubleshooting techniques online like removing the battery and leave it detached for a day, pressing the power button for minutes but to no avail. This is a new model (second hand) Asus X542ua. No warranty card when I bought it from someone.