iPod Touch completely dead, no signs of life.

At my shop we like to give a full diagnosis. What we usually do is open it up to check if it has any corrosion on the board or any visible places on the device. We throw on a new screen usually and a new battery to see if theres any sign of life. If it still doesn’t turn on we take out the logic board and see if theres any damage on the connectors or anything else. If its not the screen or battery it usually is a malfunction with the logic board itself

I have one with the exact same problem that I found it seemed to be dead. What I did was unsolder the battery and connected a work bench dc power supply directly to the phone giving it 3.7volts the same as the battery. It turned on so I knew it wasn’t the iPod that was dead. The charger dock connection was bad so I replaced it. I supplied power using the dc power supply and plugged in my charger now it shows charging so the dock connector works. I tried connecting the battery but I think it’s dead because it doesn’t charge or anything. I’m waiting for battery I’ll post when I receive it to see if it finally comes back to life.