It's very noticeable when you pay attention and compare it to the others. There are generally a lot of capacitors there, and only one or two will be swollen (th

It's very noticeable when you pay attention and compare it to the others. There are generally a lot of capacitors there, and only one or two will be swollen (the top part is supposed to be flat or even slightly curved inward, if it's curved upward, it's bad). Really, if it even looks slightly out of place, change it, capacitors are dirt cheap. I'm not sure it can be broken without being swollen, or at least that's not a frequent failure mode. Having repaired a few displays just like that, I can say it's really easy provided you are able to open the display and solder on a basic level, which anyone can learn in an afternoon. On the other hand, not all display will be that easily repaired. Sometimes, you cannot easily identify any swollen capacitors, or there is a burn mark somewhere else, or something else that you cannot identify (and thus order a replacement for). In those cases, unfortunately it generally doesn't make sense to bring it to a shop to be repaired by pros.