Bob - the big difference comes in timing. The last part of an approach typically lasts 3-4 minutes or so. If you know you are having problems before then, you don't start the last part. Instead you lurk about running checklists. Depending on the problem you may well turn off various warning systems. This will probably reduce the actual noisy bits to zero. The rationale behind this is that if everything goes according to plan you should receive no warnings. Then, if you get one you go-around. Then you work out what the problem was. We are not the interesting creatures portrayed in the media dealing with loads of warnings, bells and alerts. We like boring.