Update: Changed from 3 to 4 stars. Everything has been great with this monitor so far. I'm still not sure what caused the vertical lines/burn-in. It literally looked like the left half of the 'tuv eye comfort' product image, but with vertical lines. It hasn't happened since then and I'm happy with how it's working. I'll be back in a few months with new problems and/or thoughts. Note: I bought this monitor for 239.99. I'm sure it will be back on sale so be patient if you're specifically looking for it. First Thoughts/Rating Below: (3 Stars) 1 week and some issues have surfaced. Will be updated over time. Vertical lines appeared and screen burn-in began. As I used the monitor more, it seemed to "fix" the problem on its own. It's just not very nice to see this so soon after purchase. Be careful. Most of these "positive" reviews here are from people who get the monitor for free as some sort of paid promotional program in order to get good reviews from Lenovo.
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