Réponse à : « Touch 4 Replace Power/Volume Flex Cable - Solder? Asle? »Ok people of all ages, I'm going to help everyone out with the soldering issue with the power/volume ribbon cable. First off, forget soldering its too much trouble. Only de-solder the old ribbon cable off the iPod motherboard. Next properly place the ribbon cable on the contacts on the board. And last use a small strip of electrical tape to hold it in place. So if more repairs are needed no worries about ripping the ribbon cable. And that's how a troubleshooting engineer fixes a difficult problem Now keep in mind if the screen comes up white, just preform a hard boot with the home and power button. If the screen is still white after several try's and the computer recognize the iPod then the screen and digitizer was defective to begin with. (screen replacement) I hope this help!