Summary: LG Commercial aka LG Solutions lists this monitor IPS231B-BN-23 aka IPS231PX as having a three year warranty, however the documentation provided with the unit says the consumer IPS231P-BN and commercial IPS231B-BN have only a one year warranty. I called LG Solutions and queried the warranty length and was told that the 3 year warranty applied to units sold BEFORE Aug 2010 and that their webpage was incorrect.
Summary: I bought this monitor because of the reviews I saw on the web, and I thought that perhaps the new technologies permit to make a good monitor for such a reasonable price. To think so was a very big mistake: you can play with gamma, contrast and brightness and is impossible to get a grey balance. It looks like (in old times) a very overdeveloped negative: there are almost no greys. AVOID IT IN PHOTOGRAPHY, YOU ARE BEST WITH ANY OLD CRT MONITOR.