They failed on several fronts 1. The basic equipment they built simply didn't work at all 2. Their workaround trick of getting a finger prick blood draw, dilu

They failed on several fronts 1. The basic equipment they built simply didn't work at all 2. Their workaround trick of getting a finger prick blood draw, dilute it with water and run the test on a Qwest machine produced wrong results. 3. The fundamental approach itself was unviable. You can't get reliable results from a finger prick. Theranos failed on all fronts except being able to attract investments from non experts.