Problem with trinitron tube HP monitor 20 inch

[Batman@]

Hey I just bought a refurbished 20" hp a4331d monitor for $200 canadian. Well I have a question there are two faint lines in the display running horizontal. Should I exchange it? I heard before a lot of Trinitron tubed monitors have a problem like this. The lines are two faint dark lines that run vertical to each other, they are located like, (at the spot where you watch a widescreen dvd on your monitor, where the black bars start and the picture stop,) so basically two faint dark lines paralell to each other about 3 inches apart.

 

[NASsoccer]

this is a noted problem with the new trinitron tubes from what i have heard. I have also seen this on two myself of the new ones. I don't know what they are doing to get new tubes out but this is a wide spread problem. If you can exchange it because personally i found them unbearable.