I've been playing for nearly 10 in-game weeks now, but no matter what day I go in I never get the TV to act up. Is there something new I need to buy to upgrade the TV and unlock the Ghost scene?

EDIT: I found the red button, thanks you guys. Leaving this up so others can see what to do.

I'm not sure, I haven't got the ghost either, but if you're looking to get the Pervert trait you can go to the car wash 3 times in version 1.5C, that's how I got it

press the red button on the TV to get the ghost 

Things got changed recently. To see the ghost sex scene, you now have to actually click on the red power button on the TV but does NOT reward you the Pervert trait anymore. To get the Pervert trait (so you can get the sex scene with Miss Zero), you have to do the Charity Car Wash event three times. To unlock the Charity Car Wash, speak to Astrid at the Gas Station on Monday. I think you might have to "buy" a car wash several times for this dialogue option to appear.