The link I posted previously in this thread was saying basically the same thing as the folks on Steam - I wondered if perhaps that was the problem.
Maybe it depends on whether Linda is seeing only a black screen or whether she also sees cursor, cellphone, and some inventory. I don't remember if there is an intro video with a black screen before you take control.
Linda,
The start of
***MaG's walkthrough*** should get you started if you're stuck for what to do:
The tunnel
Hear someone being chased and is out of breath.
The cell phone has a text message from Echo to the Inspector. You are the Inspector. You arE not alone. i Am neaR (YEAR).
The inventory has vodka, clozapine tablets and a letter. Read the letter by right clicking it. Amy's family is angry at you. Exit the close up using the pointing down hand.
Close the text page and open the cell phone again. Click on top left icon to turn on the flashlight.