Forgot to add a few more things about this.
when you do get those traces repaired if any are broken, then the areas where you scraped off the solder mask, you need to use some clear nail polish or super clue to coat over the exposed traces. If you don't you leave the copper open to corrosion and that will lead to more issues down the line. I actually just use a thin coat of solder ontop of exposed traces as long as there isn't a risk of anything shorting across it.
Anytime you are de-soldering something and you remove the solder and it doesn't come free easily, you need to add more solder and try and remove it again. For really stubborn old joints I usually add a bit of solder to the top and bottom of board where the component goes through to make sure it all mixes in well before I try and remove it.
De-soldering ICs isn't the easiest thing so these things happen. Just be patient and methodical about it and you will get better over time. For practice, pick up old electronics from computer stores tossing out stuff that aren't recycling it properly, or hit up your local thrift stores for cheap older electronics like old radios and the like that obviously look like they won't work for a couple of bucks. Good way to get the experience you need without feeling bad about butchering it up, and you will likely salvage some parts you might just need in the future.
Also this is what I do to fix these old ribbon cables that start to come apart. And you really should replace it or do something about it, because the inner traces could potentially short against each other if you were to bump it while it was on. There is voltage in those traces going to the main logic in the fear cage box that it hides in. Funny thing here is that I actually machine pin headers for this. Also this repair was on an Intellivision I fixed for someone else as they had hosed up the ribbon cable pretty badly in trying to do their own repairs.
Edited by CrossBow, 12 February 2018 - 03:48 PM.