there are to many reasons why it would flash and not work any more at least to me
1. dead needs charing
2. self protection modes give that battery a rest
3. self cleaning and wont get out of that mode around 1500 - 2000 puffs depeneds on model and such trade it in might be a defect on the chip try charing first
4. if all else fails clean every thing and chare everything fresh cart with a prime drop or two on atomiser and see what happens