Filing the contacts down will probably help if it's dirty and has troubles making contact. Filing the raised notches off is probably a bad idea, as they probably put them there for a reason, it probably helps make contact more than give problems.
Here are some various scenarios and possible fixes, please use your judgment and some common sense before attempting any of these:
Guitar doesn't strum at all:
Possible Causes:
Dirty contacts - filing has reportedly worked [THREAD] (http://community.rockband.com/vbforum/showthread.php?t=9291)
Contacts connecting - if the contacts are just stuck together, check the plastic seperator between the contacts. If it looks like the metal contacts are just bent, and neither contact looks mounted to anything, look at the double strum issue part for a solution.
Contacts are too far apart - if for some reason the contacts do not make a connection when the strum is held to the max, then you make need to add something to the strum or contacts to help it have a greater reach. Remember, try not to use anything that may cause a lot of friction, like some tape can. Friction can cause more problems down the road.
Guitar double strums:
What happens is that one of the contacts are not properly mounted (the one that is not hit by the strum). When this happens, and you strum the guitar, it sends the one contact into the other, and when it does this, some of the momentum is transfered to the other contact, making the other contact jump enough to cause it to contact a second time with the first contact.
If you look at the other contacts, for the strum that works, you will notice that the one contact looks attached to the plastic holder. So what happens is that they did not use enough glue, you play your guitar alot, and after enough contact/vibrations, the glue gives and lets go.
Solution:
You want to somehow glue the contact back to the plastic holder, I used hot glue as suggested here: POST (http://community.rockband.com/vbforum/showthread.php?p=130132#post130132)
I also used tape to help reinforce it. To do this, you need to cut a thin piece of tape and drop part of it in between the contacts before the raise area in the contacts, with the sticky facing the side that is glued to a plastic housing. With a thin screw driver, push the tape against the metal contact to make sure it sticks well. Then with the rest of the tape pull it towards the plastic housing to make sure it holds tight, then tape it around the plastic housing screw area.
Not sure how well it will hold, but I know it will work to some degree if the glue comes undone again. I also put tape on the other contacts in case.
Also, you can use super glue, but then it will be near impossible to remove the contacts, which can cause headaches later if something else goes wrong, or if you end up sending it in for warranty, and they notice this.









