Any suggestions on reviving an old ASUS laptop that shows zero signs of life.

Plug it in, no lights. Hit the power button, nothing. Hold it down (saw some suggestion to hold it down for like 40 seconds), still nothing. I haven't tried opening it up yet. I don't even care if the battery is toast, I'm fine with it being tied to a wall adapter.

It's probably about 8 years old, so obviously it is slow by modern standards, but at the time it was fairly high-end, so it might serve my purposes as a secondary machine.