This guide details the process of replacing the player's power supply module. The power supply is mainly responsible for powering on the device so this may answer many problems concerning this issue.
To begin, turn the device over. There are nine (9) black clips that hold the plastic body to the case. These clips need to be removed.
Removing the three (3) clips on the front of the device will also help release the top. The front is also where the touch screen is located.
Use a Phillips #2 screwdriver to remove the screw that attaches the top cover to the rear of the device. This will allow you to remove the cover.
This is how your device will look after you remove the top.
Unscrew the 1.2mm screws labeled with a red circle and remove the power supply from the player.
Labeled with a red rectangle is the location where they are connected. Grab the motherboard in one hand and the power supply in the other, and pull the motherboard up and push the power supply down. The motherboard and power supply should then disconnect.