I think it is safe to say that one example is not enough to state for certain that a brand is bad -- although, when a product breaks, it can sometimes be reason enough to suspect quality issues and stop using a brand.
However, to truly asses quality of electronics, you need feedback from multiple individuals. If others are reporting failures, then that might just be indicative of poor quality. You also have to check whether it was just a single model having problems or whether it seems to be the entire brand. I'm not saying CHIMEI is either way, but I suppose looking at reviews on pricegrabber and newegg for CHIMEI monitors might be a good start -- specifically looking for notes about failures.
Well, the panel, at least, seems to be good enough for Samsung...
"There is not a whole lot of information on the panel used in the 225BW and there is a lot of conflicting information on the net. There have been some individuals who have dismantled the monitor and found a Chi Mei Optoelectronics M220Z1-L01 panel.
Samsung also makes a 22” TN widescreen panel of their own with very similar specifications called the LTM220M1. It is possible that they may begin to use their own in the future, so we are unable to accurately predict what panel will reside in all production 225BWs."