How to ignore faulty instrument readings in glass cockpits?
Like in a steam gauge cockpit, you can put adhesive INOP stickers on parts of the glass panel. Stickers for the Garmin G1000 are available commercially, and I had to use them extensively for my instrument rating.

Keep in mind, though, that glass cockpit aviation systems will detect a faulty sensor automatically, and the faulty instrument will just appear X-ed out (like the picture on the INOP sticker) instead of showing wrong values.

But even multiple sensor source cross checks doesn't keep you safe from misinterpretation. See Birgenair 301 accident for example.