Can not get Any sound or ask for pass word? I just bought a Dodge Van that has the DVd player installed with a large scene Monitor with no names on cover. It's installed over the driver area and can be seen from back seat and bench seat. I did not find a remote to fit it. And I need a manual.

Try multiple DVD's if not that a lens cleaner can be found at your local Best Buy to clean the laser that reads the disc. Also make sure the DVD mode is not locked down to only working if the parking break on, video screens that are sold are sold with a safety feature so you can not watch a DVD while driving and only if the parking break is on.