Power windows wont work

Son replaced stereo and speakers and drove car and rolled down the two front windows but when he pulled into drive the windows would not go back up. I have a multi meter and wanted to know how to check the switch block. Any ideas what he could have done?? cant find any fuse that is just for windows. It is a 2000 Corolla

corolla 2000 widows wont roll up after son replaced stereo and speakers. Power locks work but not windows, any ideas what to check