Khampi Disthakorn, deputy secretary general of the House of Representatives, said he had received a letter from LG headquarters in Korea that the TV did not have any device that recorded the wireless connection between its TV and mobile phones.
On April 18, during a televised debate on constitutional amendment, large display screens inside the parliamentary chamber briefly showed a picture of a partly unclothed woman in a lewd pose.
As a result, no further investigation could be done, Khampi who chaired a fact finding team investigating the scandal.
Earlier investigation said the image may have been sent by Samsung device and phone number may have been traced within days. Khampi had said the culprit could be a Samsung smart phone.