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first off check your batteries. if you are using a rechargeable battery pack disconnect it and try it off the power supply alone bad battery packs can and generally do keep radios from powering on. If this allows it to come on, try charging it for 24 hours, and then deep cycling it several times ( run the scanner with sound such as on a noaa weather channel) until it goes dead and then recharge, to recondition the battery pack. if this doesn't work the pack will need to be replaced or rebuilt (batteries plus can do this) if the radio just uses discrete rechargeable batteries simply replace them. meanwhile I'll look for a manual for you....
this is the sign of a damaged or dead battery pack. they can be rebuilt at Batteries Plus or replaced. I would also try alkaline batteries in the radio before spending money on new battery packs. Most rechargeable battery packs must be kept charged regularly, and should be fully discharged before recharging, or they will be damaged and end up with a limited lifespan. IF you are handy with a multimeter you can check to see that the charger is putting voltage out by placing the probes on the contacts while it is plugged in. especially if the cord is twisted or looks stretched, but generally it is the battery not the charger.
That means you have to put new batteries in your scanner... or recharge your rechargable batteries but if you use rechargable batteries use your yellow battery cradle for rechargeable batteries and your black cradle for alakline batteries....foe pro 82...
Radio's that have a "safe mode" go into that mode when power has been removed. The vehicles battery may have been disconnected during service for a period of time for this to happen. This is a theft prevention feature that the radio has so if someone rips it out of your car it wont work again without the code. If you have an aftermarket radio, try to find the manual for the radio maybe the code is in there and instructions on how to unlock it from safe mode. But if it is the Audi stock radio try to find the Audi owners manual.
Hello, with the limited info you supplied, I'd say offhand that #1 The volume control is dirty,or #2 The seaker inside the scanner went dead.(not uncommon) If it's a dead speaker, simply go to Radio Shack or a truck stop and buy an external speaker for a CB radio and plug it into the back of the scanner,, Hope this helps,, let me know,,, Mechanic