Several out of ... how many devices? And at which time frame? Let's say if you will produce thousands of complicated electronic devices, I can almost guarantee that you will encounter some dead devices at QA stage and some device deaths at their life cycle. Just because they're complicated electronic devices and many other reasons.

Can I have simple math? Let's say, there is 5 failed devices. Sounds awful, right? But what if these were 5 out of 1000 devices within year? That's failure rate of 0.5% per year. Very good for complicated devices. And actually not awful but very great result. Surely, there will be 5 unhappy humans. And 995 happy ones. Overall result is good, then. And probably better than industry average.

So, "several reports" are not proof on it's own - AFAIK Nokia sold many and many thousands of these devices so it's ok to see several dead devices (just as several dead iPhones, blackberries, ... whatever). It is matter of statistic - how many reports out of how many device owners at which time frame and which chances are to became loser in this "game". For Nokia 770 failure rate was high enough and there were known methods to cause issue to appear with high chances - perform many reboots or power cycles. And there was good explanation of problem and it's details. So there were special threads about problems and quite many reports and details were known. For n8x0 I did not encountered such mass failure reports so far nor I seen problem analisys. On my own experience N8x0 are not dying quickly due to LCD faults (it's more likely to physically damage it, if device falls down, etc). That's why I'm a bit skeptical about such LCD posts.