i am confused.
You said the phone said "System Error" and then shut off, but now you say it shows as charging but power is not going to the battery. Please explain what you mean...
1. Is the charger the original Nokia one that came with the phone?
2. How old is the phone and how do you usually charge it? What i mean is do you charge every day or do you wait for the battery to die first?
3. Have you tried charging with the phone off?
4. Have you tried using a different charger or using a computer USB port to charge?
Li-Ion batteries should be charged as frequently as possible. Only once in a long while should you let a Li battery drain all the way, and only if the charge life is becoming irregular.