That soldering iron is totally inadequate for this repair.
Having followed through this entire thread I would recommend that you get a suitable soldering iron. I would also recommend that you do some practice soldering before attempting to repair this. Post #2 suggests that you take it to a proper repair shop. That would be a good idea.
Having followed through this entire thread I would recommend that you get a suitable soldering iron. I would also recommend that you do some practice soldering before attempting to repair this. Post #2 suggests that you take it to a proper repair shop. That would be a good idea.