In my case my Asus 1215N refused to power on after I replaced the broken LCD panel with a new one. Once I completed the substitution, I attached the LCD panel to the flat cable and rescrewed it to the cover. Then I powered on the netbook and the display worked as expected.

Then I connected the plastic cover to the based unit rescrewing the lid to the hinges of the base unit. The hinge on the right side was locked so the screws on the right side were unuseful to connect the lid to the base unit and the lid was swinging on the right. I tried to turn on the power switch again, but it didn't light and the netbook didn't start. Some guys suggested to held the power switch for about 50 seconds, disconnecting the battery and the power supply before and so I did, but nothing changed. I reconnected battery and tried to press power switch again, but the netbook didn't start.

Is it possible that some cables have come loose?

In these cases what kind of checkes do you suggest?

⟐ Answer accepted July 06, 2021 at 20:35 MST