Testing device

A testing device that brings a contact terminal into electrical contact with an electronic device formed on an inspection object so as to inspect the electronic device, the testing device comprising:

• a mounting table including a coolant flow path through which a coolant capable of transmitting light flows, a placement side of the inspection object formed by a lid member and a side which is opposite the placement side of the inspection object and formed by a light transmission member, the mounting table being configured to mount the inspection object on the placement side formed by the lid member;
• a light irradiation mechanism having LEDs disposed to face a surface on the side opposite the placement side of the inspection object of the mounting table, the LEDs being directed toward the inspection object;
• and
• a controller configured to control heat absorption by the coolant and heating by light from the LEDs so as to control a temperature of the electronic device to be inspected,
• wherein the lid member and the light transmission member come into contact with each other, and
• wherein the controller is configured to:
• control a light output from the LEDs based on at least a measured temperature of the electronic device to be inspected;
• and
• control the heat absorption by the coolant based on the light output of the LEDs.