680 Touch Screen Issue - Treo Forums

ROSEBUDZ · 12-16-2006, 01:26 AM

I got a 680 today. he touch screen worked at first and now it does nothing at all. I scrolled to preferences to try that but nothing. Than it froze completly so i did a soft reset. It kept happening so I did a couple more soft resets. Finally i did a hard reset and it toom me to the English option and than the stylus tap target. It still will not do anything and I am stuck at that point. Anuy suggestions. I tried the factory reset but it never goes to the palm powered grey screen. Any help would be great. My 650 NEVER gave me fits like this...

jfa · 12-17-2006, 10:25 PM

you probably need to try a warm reset You can go to palm.com or find a thread here at ET regardung warm soft and hard resets and procedures for each. Follow the directions and get back with your progress check this out
http://palmdiscovery.netfirms.com/nf...ndex.php?p=200

kevinmichaels · 12-18-2006, 12:31 PM

Hello ROSEBUDZ,

This is Kevin from Palm Inc. Are you using an adhesive screen protector? If it is trapped under the screen edge, it can interfere with touchscreen calibration. Occasionally, just having the screen protector on the screen can cause the issue. Try removing it to see if that makes a difference.
Or, there might be debris trapped under the edge of the screen. Use the corner of a piece of thin, stiff paper (copier paper works well) to very gently slide all around the edge of the screen. Don't let the corner of the paper travel more than an eighth of an inch under the screen edge frame. By doing this, you may be able to dislodge small particles of debris trapped under the frame.

You might also take a look at the Palm Knowledge Library article "Calibrating your touchscreen (digitizer)", as it has a couple of other troubleshooting steps, as well.

Sincerely
Kevin

Kumar_Shah · 02-26-2007, 10:34 PM

kevinmichaels is right. Had this problem once with my Treo 650 after I installed a new screen protector. Removing it and repositioning it solved the problem.

skwid · 02-27-2007, 08:12 AM

I just had this problem with a brand new 680. Mine had to be replaced and it was only 2 days old.

fleo · 03-29-2007, 12:17 PM

I had a similar problem. I never took the plastic thingy off from when I purchased it and a little dirt got in it and caused the touch screen to freeze over and over again. Only happened after I had it for a month, otherwise it was working ok. Took it off and its all good now, albiet the OS is a little slower than my old 600.

Thanks Palm guy for chiming in and giving us a heads up!

LostViking · 06-20-2007, 03:44 PM

First off I love seeing support by the manufacturer in this forum, especially with good information.

I repair touchscreen devices for a living. I've probably replaced 2000 digitizers in the last two years. Use a screen protector!

Touchscreens are made with a glass plated covered with a conductive surface, then a very thin gel, then a plastic cover layer (that's conductive under neath). When you press on the screen you push the gel out of the way and make contact between the two conductive surfaces. The "device" reads the location by reading the resistance along the side and top of the digitizer (it has a resistive material along the edges where you can't see). What you are doing by pressing different places is changing the amount of that side/top resistance. If you are familiar with math you are using quadrant A of a cartitian coordinates system. But don't worry about the terms.

The device can see where you tap and the location is calculated.

If something is pressing the two layers together, anything, that is the only "tap" you can have. The first tap must be released before it can see another tap. That's why crud under the gasket on the sides (where you can't see) can cause this problem. It's also why if you get deep scratches the digitizer will either stop working all together (already sees a tap) or be misaligned. The misalignment is easy to explain. If the surface is creased it is closer to the glass in that spot. If you try to tap near it, the depression makes contact first and the device sees that location instead of where you were tapping.

Bottom line, use a screen protector and keep the screen clean. Even dust on the tip of the stylus can scratch up the digitizer surface.

white lion65 · 07-24-2007, 12:26 AM

to Lost Viking : Hi , I hope you can help me my treo650 fell and the digitizer glass broke so since It was only the digitizer I bought a new one on ebay ( by the way the LCD screen looks fine all around no dead pixels,orange spots, etc. nothing ) so I take my treo apart replace the digitizer and put it together again;so I have new screen but the digitizer dont work, so i dont know if the digitizer is the fault??? or maybe my fault??? I remeber I didn't clean the old glue Between the Lcd and the digitizer or maybe any other reason??? please respond ASAP because I"m without phone ,with your experience I think you can help me I''ll appreciate your help and everybody's suggestions..

Thank you.

P.s. maybe you can post the procedure step by step to make sure I did't OK the installation.

thank you again!!!!

LostViking · 07-25-2007, 05:49 PM

Quote:

Originally Posted by white lion65

to Lost Viking : Hi , I hope you can help me my treo650 fell and the digitizer glass broke so since It was only the digitizer I bought a new one on ebay ( by the way the LCD screen looks fine all around no dead pixels,orange spots, etc. nothing ) so I take my treo apart replace the digitizer and put it together again;so I have new screen but the digitizer dont work, so i dont know if the digitizer is the fault??? or maybe my fault??? I remeber I didn't clean the old glue Between the Lcd and the digitizer or maybe any other reason??? please respond ASAP because I"m without phone ,with your experience I think you can help me I''ll appreciate your help and everybody's suggestions..

Thank you.

P.s. maybe you can post the procedure step by step to make sure I did't OK the installation.

thank you again!!!!

Hi, I'll help as much as I can. You can drop my Pdaparts.com and look up their replacement screens/digitizer. They show step by step directions for the replacement. At first glance I'm not really sure what the problem is with your system. Make sure the connector was latched closed when you inserted the ribbon cable from the new digitizer. Make sure you didn't put it on upside down. The metal contacts are only on one side of the ribbon cable. I'm not looking at one right now so I'm not sure if that is possible. Check. The glue doesn't matter, it just holds the digitizer is place. The digitizer is a completely separate part and does not matter if there are LCD problems so don't be concerned with that.

Other than that I can't see a reason why, unless the digitizer you purchased was bad. It does happen. There is a fragile bond between the "contacts" on the edge of the glass and the ribbon. It does not take too much to cause this to fail and if even one of the four connections fails, the digitizer is trash. You can probably by the digitizer from pdaparts.com. I think they also sell the complete display assemblies. For the 650 they were pretty cheap too. For some reason the 680 ones are much higher.

Give it a shot.

By the way, I sent my Treo back. I don't use one anymore and I'm not coming by this site anymore. They keep sending me emails so I guess asking nicely didn't work. I'll give them a SHOUT this time.

Anyway regards.

white lion65 · 07-26-2007, 09:49 PM

Quote:

Originally Posted by LostViking

Hi, I'll help as much as I can. You can drop my Pdaparts.com and look up their replacement screens/digitizer. They show step by step directions for the replacement. At first glance I'm not really sure what the problem is with your system. Make sure the connector was latched closed when you inserted the ribbon cable from the new digitizer. Make sure you didn't put it on upside down. The metal contacts are only on one side of the ribbon cable. I'm not looking at one right now so I'm not sure if that is possible. Check. The glue doesn't matter, it just holds the digitizer is place. The digitizer is a completely separate part and does not matter if there are LCD problems so don't be concerned with that.

Other than that I can't see a reason why, unless the digitizer you purchased was bad. It does happen. There is a fragile bond between the "contacts" on the edge of the glass and the ribbon. It does not take too much to cause this to fail and if even one of the four connections fails, the digitizer is trash. You can probably by the digitizer from pdaparts.com. I think they also sell the complete display assemblies. For the 650 they were pretty cheap too. For some reason the 680 ones are much higher.

Give it a shot.

By the way, I sent my Treo back. I don't use one anymore and I'm not coming by this site anymore. They keep sending me emails so I guess asking nicely didn't work. I'll give them a SHOUT this time.

Anyway regards.

Hi Lost Viking: thank you for taking the time to response my question,really appreciate it and I'll give a shot to make it work ;again thanks for all your info and hopefully make it work .

THANKS!!!!