I just noticed that the problem exists even when an external display is connected in VGA port and power chord is not connected.
Therefore it cannot be the external power source that is the problem but it's a more generic problem when connected to external devices.
I just noticed that the problem exists even when an external display is connected in VGA port and power chord is not connected.
Therefore it cannot be the external power source that is the problem but it's a more generic problem when connected to external devices.