Dead while charging, what is the solution?

Phone was kept in charging full night. In the morning I found it is dead. What could be the problem. I have visited repairing shops, they are telling EMMC problem. But I can't understand how can emmc get damaged while charging? Is there any solution for this. I have tested short capacitors and found 5-6 capacitors in grounded condition from both end. Tried applying upto 2A current through them, cpu is heating but none of the capacitor is heating. Any solution can save my data and I will be very much thankful to you.