From your description what has happened is that the coins were feed down onto the electrical board inside of the radio and shorted the board.
So is there anything we can do to fix it? Or will it entail having the entire stereo replaced?
You will be money ahead to call your local salvage yard and get a replacement radio. The replacement radios can normally be purchased for about $75..
There are places that repair them but it will cost about 3 times as much as a used radio
Ah, great idea! Thanks. I did mention a thumpa-da sound too... could that be down to us having lugged a trailer 1000 miles? Or do I have to ask that question separately???
You don't need to ask seperatly. When do you notice this noise?
Great. Thanks! The noise started once we'd arrived. You can feel it in the sole of your foot as you drive. It's like a thumpa-thumpa throb. Not like the clutch/gears but something else. It's not related to how fast you're going - it doesn't get any louder, although it does get faster as you drive faster.
Most likley the noise that you are hearing is a tire noise. It may be related to towing a trailer but normally can be resolved by rotating the tires. A tire rotation is the place to start. If you rotate the tires and the noise/feeling changes, you know that it is indeed a tire noise..
Okay, thanks so much. Really appreciate your help!
Happy to help.
Have a great night....Thanks, Josh