Printed circuit board package and display device including the same

A display device, comprising:

• a display substrate including a display area for displaying an image and a pad region disposed at a side of the display area;
• a first pad portion including a plurality of first pad terminals, the first pad portion being disposed in the pad region, the plurality of first pad terminals being arranged in a first direction;
• and
• a printed circuit board (PCB) including a base film and a second pad portion, wherein the second pad portion is disposed at a side of the base film and is electrically connected to the first pad portion, the second pad portion is disposed at a side of the base film and is electrically connected to the first pad portion,
• wherein the second pad portion includes:
• a plurality of second pad terminals electrically connected to the plurality of first pad terminals;
• and
• a plurality of first test lines,
• wherein the plurality of second pad terminals includes a plurality of sub-pad terminals,
• wherein one of the plurality of first test lines is connected to a first sub-pad terminal of the plurality of sub-pad terminals, and a second sub-pad terminal of the plurality of sub-pad terminals is not connected to any of the plurality of first test lines, and
• wherein each of the plurality of first test lines extends toward an end portion of the base film.