What to do with error code 3?

I have replaced and cleaned everything I can think of on this roomba. I keep giving up and putting it away and getting it back out to mess with. I'm so sad I cant fix it!

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

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crwdns2889612:0crwdne2889612:0 0

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I have the same problem. Changed the battery but still get charging error 3. Wondering if new motherboard will cure it. Chime in if you have a fix please.

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