PowerBank charges after three seconds of shutdown, what should I do?

Question

Do it yourself

PowerBank arrived from China, almost non-working, wrung out the loot, but the question arose of how to bring the bank back to life?
The trick is that it works from 3 seconds. Cut-off, then turns off for 3 seconds. And again, everything is the same.
Substantive QUESTION #1 What could be wrong with this jar?
Substantive QUESTION #2 How do I fix this?
PS Bank for 30.000 mAh.

Answer 1

1. The jar is dead.
2. Replace with a working one.

Answer 2

What does "works for 3 seconds" mean? Charges in 3 seconds or charges in 3 seconds? If the first - then it may be an option that the bank "does not see the load." You can try to find or draw a diagram and figure it out. But since the money was returned, it was only out of "love for art." Easier to take apart for parts.

Answer 3

Most likely the protection is triggered due to a short circuit. I do not advise digging, buy a new one.