Patent ID: 7957157

Claim:
An electronic apparatus, comprising: a housing; and a printed circuit board housed in the housing, wherein the printed circuit board includes: a semiconductor package having a substantially rectangular parallelepiped body, a first face, and a second face positioned opposite to the first face; a board arranged to face the first face, the board having a mount region corresponding to the first face; a plurality of solder balls provided on the board so that upper portions thereof contact the first face of the semiconductor package; a first electrode provided at a first corner on an outer circumference of the second face, a second electrode provided at a second corner, a third electrode provided at a third corner positioned diagonally with respect to the first corner and a fourth electrode provided at a fourth corner positioned diagonally with respect to the second corner; fifth, sixth, seventh and eighth electrodes provided on an outer circumference of the mount region correspondingly with the first to fourth electrodes, respectively; a first conductor mounted on the second face to connect the first electrode with the second electrode; a second conductor mounted on the second face to connect the third electrode with the fourth electrode; a third conductor mounted on the outer circumference of the mount region to connect the sixth electrode with the seventh electrode; a pair of fourth conductors mounted on the outer circumference of the mount region so that one of the fourth conductors is connected to the fifth electrode while the other of the fourth conductors is connected to the eighth electrode; conductive bonding portions applied to the four corners on the semiconductor package to bond the electrodes on the second face with the corresponding electrodes on the mount region, respectively; and a determination module connected to the pair of fourth conductors and configured to determine whether or not there is a difference between a value of a current to the one of the fourth conductors and a value of a current from the other one of the fourth conductors.