So if you have a password on a broken screen ipod go into settings and remove it till your done working on the device and it makes white screens very easy to fix. Itunes does a hard reset after the restore to finalize your setting changes. Then when the backup is finished tell itunes to restore the device from the backup you just made. The button holding instructions for a hard reset will work if you can time them right but as long as no password is set on the device just open itunes with the device connected and tell itunes to backup the device. So the trick in fixing the white screen is to get the ipod to power off and back on. Ipods do this calibration durring power on test. So just like any computer each screen has to be calibrated for your computer and so does an ipod screen. If you disconnect this display and put a different display on while the device is not powered off you get a white screen and yes you may have turned the device off but that power button is very easy to bump while doing this repair. Ipods are like little computers with a simple graphics card hooked to a display. You definitely need that magnifier-preferably stand mounted so you have 2 hands free to do the soldering underneath. Ideally you would get a resistor the same size & resistance, but I didnt have access to smd reworking-type equipment. That was a year ago & the ipod has worked fine since. I bridged that missing resistor by applying some solder across the 2 pads and when then lcd was re-connected the white screen was fixed. I had accidentally knocked mine off whilst prying up the lcd connector. The 2nd component up should be a little black resistor. There should be a row of tiny components in a vertical line between the right hand side of the connector and the ambient light sensor (the one with the foam sponge around it). Using a magnifer (20x binocular if possible) look at the area to the right of the lcd connector on the mother board - with the lcd itself disconnected. IF ALL of those things fail and you know the screen itself is not faulty then one thing that worked for me was: And of course if you swap the screen and a new one works then of course you know the first screen was faulty. Always try the reset, re-seating lcd connector options first. I would agree with all the solitions above.
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