Samsung Galaxy J5 J510 Power Button On-Off Key Jumper And This is Simple Problem 

Now, this solution simply shows the line paths (ON-OFF ways)of the power key. The problem may easily configure if the power ON and OFF switch key has no response, but the device is not totally dead for it shows a charging indication when you charge it up.

Continue with the following troubleshooting solutions and establish bridges necessary for the points that have been damaged. Battery voltage should be at least 3.8V
If the battery voltage is lower than 3.8V or is not showing charge then it means you need to change your battery in first place and check.you need to do is to check battery voltage at its terminals in order to verify whether the problem is with the battery or with anything else.

Problem: The Mobile Power Button Not working Mobile Swicth Off.And Mobile Not open

Hardware Solution Samsung Galaxy J5 J510 Power On-Off Button 

 

Samsung Galaxy J5 J510 Power Button Ways, On-Off Switch Jumper, Set Is dead Problem, Power Key Ways.ut still we do not take any responsibility for any damage it may cause to your cell phones. Use these repairing solutions at your own risk. Thank You.