Netbooks are identical to laptops in this sense: their manufacturers consider failure information to be proprietary, and won't release it. So actual, industry-wide, figures are effectively unobtainable.
In a general sense, however, you're more likely to have a hard drive or a fan fail than to have a solid-state component like RAM fail. Netbooks, like laptops, are subject to a wide variety of vibration damage due to their mobile nature. Screens will be cracked, machines will be dropped.
If you're thinking of deploying netbooks en masse I'd suggest getting the maximum warranty on each one and sending them back whenever they have an error, and making it the manufacturers problem. When the warranty expires, throw the dead ones away. Where I work, we've been doing that with laptops for years, and it's really streamlined the whole process...Maintaining mobile computers is such a huge p.i.t.a, that it's far more economical just to have a few dozen spares lying around, than to have a bunch of guys whose sole job is to try and fix broken ones.
rma? did you meant return merchandise authorization or maybe just ram?
– whitequark – 2010-06-07T17:18:29.500@Whitequark I meant RMA (or simply computer repair) – Oskar Kjellin – 2010-06-07T17:26:05.987
2This would be very difficult to answer. There are too many key components (and key component manufacturers) to get a handle on this. You would be better off asking the individual companies who make the end product themselves (if they would even be remotely interested in releasing that information). – Michael Todd – 2010-06-07T17:32:17.407
@Michael: I have a feeling that if you asked the company they would say 50 years or something xD – Wuffers – 2010-06-07T18:01:04.937
@Michael Yeah, I asked the company but ofcourse they do not wan't to release this information and risk making themselves look bad. What I am looking for is more of a guideline in how many percentage. It is so hard to get an idea if you do not keep count etc – Oskar Kjellin – 2010-06-07T19:39:01.077
@kurresmack: we have a [repair] tag; please don't create unnecessary tags if an existing tag will suffice. – quack quixote – 2010-06-07T19:58:46.210
@quack thanks, did not know of that tag as I am new to superuser. For me RMA was more natural, that's why I chose it – Oskar Kjellin – 2010-06-07T20:01:59.947
@kurresmack: to me RMA just means "return to retailer", and doesn't imply repairing anything. :) i usually use the tag input box as a sort of search -- check the autocomplete options to see if there's something close to what you're looking for, and try synonyms. anyway, not a huge deal; we can always retag later if necessary. – quack quixote – 2010-06-07T20:16:46.303