Unresponsive touch controls, can't turn TV on.

Hi,

I got a LG 50PK590-ZE plasma TV, when I plug it in at the back, I get three successive clicks and the red power light in the bottom right comes on but that's it. When I try to get the TV to come on with the touch controls on it, none of them do anything. Unfortnately, I do not have the remote so I can't try that.

Not sure if it's worth mentioning but this issue first arose the first time I unplugged the TV after doing a factory reset on it.

Any ideas? Is there anything I should check? I have a multimeter on hand if so.

Thanks