My FR70 watch is dead. I jus received it as a replacement for one that had an error message. It worked long enough for me to put info in then went for a run and was trying to get my hear rate to show

'make model (what it is)' in all questions please Lucas.

This error appears to come up in Garmin watches and Heart Monitors. See the link

https://www.google.com/search?q=AVB2.0000+AID2.200+0000+is+flashing

..

go http://static.garmincdn.com/pumac/FR70_OM_EN.pdf
to this link for manual.

No solution. I just tried to change my battery yesterday and am receiving the same message. If I get a resolution I'll post it. Just wanted to let you know you're NOT alone!

Some watches have a "reset" button or combination of buttons that must be pushed to clear all the electronic registries on the watch's little computer after you replace the battery. You might try taking off the watch back and seeing if your watch has this requirement. Even then, it's not always a perfect solution. Last week, I replaced the battery in a watch that had been dead for some time. The watch appeared to come alive again when I put the new battery in, but when I pushed the reset pin (on this movement, it was on the watch movement itself, next to the battery), the entire watch went dead. Nothing I did would wake it up. I removed the battery, waited 30 seconds, then re-inserted the battery. Problem solved; the watch powered up, and I was able to set the time and access all functions again.
On some digital watches from the 1980s, after replacing the batteries, you were supposed to push and hold all the external buttons for a few seconds to reset the watch. I don't think manufacturers still make watches that respond to this, but it is easier to try than taking off the back and re-installing the battery.

I am guessing the battery went dead. Put the watch under a lamp about 10 inches from the bulb and leave it for 12 to 24 hours. This will recharge the cell. Then you will have to go through the setting procedure from the start. Either refer to the CD, your owners manuel or the Citizen website. You will need to do the "reset" procedure most likely. This ordinarily is not needed but in your case most likely will be needed as a result of your battery going completely dead.

Same thing happened to me, took watch to watch shop, they changed the battery and the chimes stopped working. Simple fix, the faceplate was put back on wrong. Unscrew the face plate and turn it upside down (or right side up depending on your POV) the circle on the inside of the faceplate will line up with the springs inside the watch and the chimes will start working again. If you have a pair of eyeglasses screwdrivers, like I did, you can do this yourself.

the watch is on the battery is not dead i lost for about a month but i hear it [every hour] in my room where could it be???? :-(

It would be difficult to state with certainty, because it wouldn't likely be possible to determine how long the watch was in storage before you received it. Most watches will need batteries between 2-5 years after their manufacture.
Higher-priced watches could easily be that long on the shelf before sale, but I would contact the seller with your complaint. The seller should at least be conscientious enough to ensure the watch is running prior to shipment.

I'm having the same problem. It's been working fine for about 4 years and now there are no bars or the picture of the satellite. There is a little "C" or "[" next to where it should be though. Maybe that is some sort of error message? I left it in my window for three days straight to get full days of sunlight and the battery is full but still no signal. Did something happen to the atomic signal carriers? Or is my watch finally dead?

I am assuming you have a lithium battery and they test good at 3. Since they can die off slowly i would replace it as it may not have enough to power your watch. These will typically need to be replaced about every two years or so.