he's also re-built LCD screens entirely, although that's a very tricky thing (mostly to replace the backlight tube on pre-led screens), and he gave that up because it was so fiddly.
Ugh, I've replaced a backlight on a laptop screen before, it was NOT fun, not at all. Imagine a flourescent bulb the width of your laptop screen, but 1/8" in diameter (or less). Usually hidden under sticky foil tape at the bottom edge of the display. Fortunately, the next time I had to fix taht screen, it was a cracked panel, so I just replaced the entire assembly.