I wanted to ask an answer, then post an answer, but, don't think I can do that so...

After you remove your old screen look on the tip of the thin video cable and you will see what looks like a little aluminum/mesh cushion pad. Some manufacturers are shipping replacement screens without this pad and without it you will get a white screen.

Carefully use an Exacto to scrape the old one off, try to get as much adhesive as you can when your working and note the orientation and which side the adhesive is on. Place the cushion on your new screen and hook it up.

I got a dozen screens in from a manufacturer and was scratching my noggin thinking why is the old screen working and all the new ones white when I discovered this little nugget. :)

Update

@phil, here is a photo to clarify.

Update

I had the same issue last night, thomas. I did run into one bad screen, but, finally, I hooked up the original and got the video back then disconnected and added another screen. It was white, but, after doing the Home/Power combo a couple of times it came on. Something to consider. And check on the board to make sure you haven't bent or torn off one of those tiny pins on the video connector -- I worked one once and accidentally broke one off, ugh, had to use a 20x loupe to notice it.

I try to keep a couple of those cracked, but working screens around to double check that it isn't an issue with the replacement.

Update

IT COULD BE THE PART

Just a note, I've been ordering replacement screens from a wholesaler and have had lots of issues. I've got 4 sitting on the shelf that I tested and all have a white screen.

I can use an old screen and no problem, switch to the new screen from the wholesaler and get stuck on the white screen...even after several resets, powering down etc.

I plan on calling them tomorrow, dunno if it makes a difference, but in this photo you'll see on on the left is the connector for the new screen which leaves me with a white screen and the right a connector from an old screen which works fine. You could be having the same issue.

I had this problem a long time ago and never found an answer that worked for me...I just had an iPod Touch 4G last week do this after an LCD change, and I fixed it. I had another one do it today, and was able to confirm a fix

Here is what I did:

1)while PLUGGED INTO COMPUTER, hit power/sleep to blacken screen (if it is already black, toggle through white screen and then back to black)

2)press home button in and hold, immediately press in power/sleep and hold

3)hold until Apple logo appears, release

I would agree with all the solitions above. Always try the reset , re-seating lcd connector options first.... And of course if you swap the screen and a new one works then of course you know the first screen was faulty.

IF ALL of those things fail and you know the screen itself is not faulty then one thing that worked for me was:

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. 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). The 2nd component up should be a little black resistor. I had accidentally knocked mine off whilst prying up the lcd connector.

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. That was a year ago & the ipod has worked fine since. Ideally you would get a resistor the same size & resistance , but I didnt have access to smd reworking-type equipment. So far so good!

You definitely need that magnifier-preferably stand mounted so you have 2 hands free to do the soldering underneath.

I replaced a cracked screen.....after connecting the new one and before closing up, everything showed up fine.....then all of a sudden, white screen. I plugged into iTunes but it was password protected. I actually punched in the code, guessing where the numbers would be and it worked! So, everything seems to be there in the white screen. I've tried 2 different screens with the same result. Quadruple checked connections, tried restoring and the hold the buttons method. Nothing but white. What confuses me is why it was fine at first then all of a sudden white screen. I don't think I did anything wrong....I've done about 8 repairs before without this problem.

Many good feedbacks but his problem is a white screen and that usually has nothing to do with the digitzer but with the LCD. So resetting in any ways will help. If not there is no simple solution to this. I have had success with unplugging the LCD connector, spraying contact spray on the connector and reseating the connector.

Both my sister's and mine had cracked, so I replaced hers first (waiting on a battery replacement, not using hers a a guinea pig) and it worked like a charm with no conflicts. Mine, however, should have been a much easier replacement because of the way it broke, but instead I got this white screen. I did a hard reset by holding sleep and home and it worked after a bit. Here is the video I did it from:

http://www.youtube.com/watch?v=dgcmZa5dC...

And for anyone wanting to know how to revert the firmware, here is a website with the downloads (tested and works - at least it did six months ago):

http://www.felixbruns.de/iPod/firmware/

Simply plug in your device and hold shift and press restore, a dialog box should appear asking you for the file location, select it, and it should work.

Does your old screen still work at all? If so you could plug in the old screen and see if it still works, if it does then your screen is probably bad. Make sure you have the plug snapped all the way in also, I have seen some only snap down on one side (just enough to power the lcd).

Some people have also claimed to have success by letting the battery run dead and then recharging it. I have never had to use this method so I am not sure if it works or not.

One last thing to try is resetting it again, sometimes you may not have hit the buttons just right and the reset did not take place. I just replaced a screen yesterday that I had to try 4 times to get it to reset (I accidentally hit the power button while the lcd was unplugged and got the white screen).

Hope this helps you a little bit, good luck.

you must do a hard reset. press power button and home button at the same time during 10 seconds.

I had 2 LCD's go white screen after I tried replacing a cracked screen. I believe my problem was that I did not power down the IPOD Touch properly before I installed the new LCD. Damage to the LCD and Digitizer occurred when power was still present while connecting the new LCD. After letting the power completely drain from the IPOD Touch, I installed a new LCD/Digitizer and this solved my problem. Make sure you power down (hold the power button and swipe to power off) your IPOD Touch before removing and installing a new LCD/Digitizer.

Sometimes this is a software issue, and will resolve itself when the battery dies.

I was having the same problem with the white screen after replacement. I tried four screen with no luck. I finally got it to work by watching this video on youtube. It was my problem and it could be yours if nothing else works. Here is the link

http://www.youtube.com/watch?v=JYpBgcHSx...

I had this same problem and i just spent 10 minutes trying to find you my solution. I remember the site that helped me fix mine http://www.kindredcone.com but they haven't tagged the article properly and i can't find it this time. If you have a look i know it's in there. I accessed the site from Google, you can try that also. Just type in your problem. But try the site first, maybe I'm just brain dead and can't think how to find it properly with the right keywords.

I recently repaired an ipod touch 4th gen and I guess I damaged the lcd board connector while installing the lcd connector and got the white screen. I inspected the connector and noticed a pin had been damaged so I resoldered the bad pin and it worked great afterwards.

i have to this display problem ...but im have display problem , i try with another display and now is ok ....i

Hi, I am having the white scree issue after screen replacement too. I noticed that I tore the little black sqaure pad near the camera, (the light sensor area?). I watched the video that helped Linda, and it seems like that area is my problem, but for the life of me, I cannot see where he soldered to make a connection! Does anyone know of a better picture of this area and where the solder needs to go to make this connection?

Jude, if you go back to the video and pause it on 7:53 that will probably help you see it better. Looking at the screen the light sensor is on top, we want to look at the bottom row of components. If you start on the bottom right going to the left, the component missing is the second to the left. It's suppose to look like the third component on the bottom. I hope i was able to help you on this. Linda

Linda, Thank you!! I'm going to give it a try today...I'll let you know how it goes:)

I have found no problem with any of the pins with a magnifying glass, everything seems to be perfect, the ipod works fine with another LCD but for the life of me I can't get this red digitizer LCD to display anything other than a white screen. Tried a hard reset, everything. Is it a bad screen, or am I missing something?

I had a similar problem yesterday with an iPhone 4 screen. After i replaced the screen and turned it on, the screen e was white. You could see the apple and the apps, but the digitizer would not function. I luckily had ordered two and tested the second one and it worked perfectly. I suspected it might have to do with a damaged clip from the first installed screen. Couldn't find the problem with the white screen.

Steve, I would like to confirm the missing resistor near the LCD connector , thank you so much .

One more case to create a white screen issue. From my point of view, if not solved by previous sugestions (holding buttons, reseting connectors, draining battery), the cuase of the white screen is a open circuit.

While replacing the screen it will be necessary to bend the circuit board to connect the new screen. In my case I did not noticed that the flex cable controlling the volume and power button was broken.

After replacing the cable a assembling all the parts, the white screen work perfectly.

In some cases I had also short circuit the battery connectors with the home button, and the ipod came to life again.

Has anybody gone through a similar scenario and/or solutions ?

My advice, checks all components twice.

JM - Montreal

Replacing the screen on te second ipod 4th gen I got the white screen... Got the first advice...connecting to iTunes. Windows 7 installed the drivers, like it was a new device and the iTunes asked to restore from backup. I did, the white screen dissapeared and got the apple. Cool, thanks guys!!!! Not I'll try for the 3rd one (got 3 kids). If anything happens I'll update....

i put the new screen on and got the white screen so i put the old screen back on and white screen i tried the home and power button about 4 times and still white i looked and looked for a answer and the only one left i see is to let it die then plug it in to charge it and people say that work got any ideas please tell me the new screen i got was white but had a big black spot on it like it got crushed in the package so im sending it back and getting another one but my old one is still white hopefully i can find a fix before the new one comes in