"From Within"

Electronics not working is often a common occurrence. But what do you typically do when it stops? Are you the kind of person who will throw it out and buy one that's newer and runs far better than your previous one? Perhaps you're the kind of person who would much rather take it upon yourself to open it up and see what you can do to fix it. I'm one of the latter.
My profession for quite some time was being an electrician. I've done various things from fixing faulty wiring for people, to a computer that refuses to turn on, to my personal favorite, taking apart a piece of technology that is old and rusty, cleaning it up, and making it run once again as if it was never previously used. I often took pride in my work, knowing that every single piece of technology in my possession came out far better than when it came in.
My son's gaming console, the Z-Cube, had stopped working. He gave it to me and I told his pouty little face that I would fix it. He said it refused to turn back on after last night. He said he'd tried everything he could think of and nothing worked. He didn't even know what he'd done to break it so badly.
I took it to my workshop and began to take it apart. It took some time, and eventually I had to look up a tutorial because all the pieces were so complex and all plastic. It was no wonder it was nearly broken, get even a little rough with it and an important part could break fairly easily.
After some time, I finally got the thing taken apart. The thing sitting in the middle of the motherboard surprised me. It was a little black box that said "HANDLE WITH CARE". I tried prying the box from the motherboard, only to find that it wasn't attached. I had no idea why it would be there. Had my son left this for me?
I carefully undid the wrapping and opened it up.
Whatever was inside leaped out toward me in an instant. It moved too quickly for me to get a good look at it. I heard it behind me, banging against things and making scratching noises as it scurried all through my office. After a few seconds, the noise stopped. The creature was still.
Suddenly, a dark figure emerged and presented itself to me in an almost human form. It had solid black eyes and scruffy brown hair. The way it crouched before me looked like something from a nightmare.
"Are you the electrician?" The creature said in a low, dry rumble. I nodded.
"I require you do my bidding." It said. "For every house you visit to fix, you must place my box inside for a small amount of time, place me back in your pocket, and carry on the job."
"I have so many questions. Why should I do this?" I demanded.
"If you fail me, you and your family will perish."
"Don't you dare threaten my family!"
"Allow me to show you what happens when you disobey me." It said with a twisted grin. He raised a hand above his head as if to strike me, then the room went dark.