There are two major hurdles:
- there is not nearly enough uniformity in the high-tech waste.
- the life-form will probably need to be able to precipitate metals in its biology (which I think is either rare or unheard of in reality)
Evolution relies on trial-and-error at an astronomical scale. For this scenario to play out, you'd need countless individuals to each encounter an identical piece of tech refuse, so that one era's not-fatal juxtaposition could, over many generations, turn into a harmless pattern, and eventually develop into a useful bond.
You'd need there to be at least one common piece of electronics that very frequently appears in exactly the same state as far as physical form and functional state. You'd need a practically unlimited supply of those exact parts, and that supply would need to be uninterrupted over geological time.
How might that happen?
Imagine a scenario where a massive supply chain is completely run by an artificial intelligence whose masters have long gone extinct or abandoned it. This supply-chain makes electronic wrist watches, and it's completely self-sustaining: it finds the raw materials, extracts and refines them, manufactures all the parts, and assembles them into working watches.
But now its masters are dead. (The watches are slow, so the masters lost track of time and missed lunch, and dinner, and breakfast, and got fired from their jobs -- not for being late but for being unproductive -- and their mates left them and so one day there was no next generation.)
So the watch parts are piling up in the warehouse, and similar pile-ups have occurred at every stage of production. For tens of thousands of years, every factory that existed or has been built has eventually filled up and overflowed with its finished output. A hundred landscapes blanketed in those tiny screws. Lakes of watch hands. A mountain of crowns, glistening darkly against the rocky landscape.
Is this "high-tech waste?" Well, it's not post-consumer material, and that's vital: every item of post-consumer material is wrecked in a unique way that frustrates the glacial program of trial-and-error that Mother Nature relies on. Pre-consumer material, on the other hand, is wonderfully uniform, the perfect feedstock for Nature's lazy game of Russian roulette. By being identical and abundant, it presents a massive reservoir of free work waiting to be claimed by
freaks the first individuals who are able to unlock it.