Take a look at the passage again:
Bored with the revision of his research essay. Patrick poked the soft front
of his flat-screen monitor, fascinated by its squishy surface.
You chose to transform the participle phrase into a subordinate clause and then connect it to the main clause that follows, like this:
Because he was bored with the revision of his research
essay Patrick poked the soft front of his
flat-screen monitor, fascinated by its squishy surface.
Unfortunately, to do this correctly, you would need a comma between essay and Patrick. Review the rules.
Go back to the sentence to try again.