Touchscreen not working all of a sudden CF29

Hey guys, my CF29's touchscreen just stopped working all of a sudden. Worked great, then next time I turned it on just stopped all together. Checked Bios, checked device manager, tried to update drivers, tried to rollback drivers, nothing worked everything looks great and the laptop is in great shape. Any ideas why it would stop working?

Is there a way do just disable to touchscreen with one click that I might have hit on accident?

 

Nope.... You may need to take the back off the LCD and check either your ribon cable going to the touchscreen... The inverter and/or the touchscreen fuse. I doubt it would be the fuse unless you were fooling around with modding something and didn't take the battery out first. I've never heard of a screen fuse just going bad in the middle of something... But I was in the middle of a touchscreen calibration a few weeks ago with a CF-18 and the thouchscreen just stopped... The tscreen ribbon cable had slipped out of it's holder.

Read a few threads and do a few searches and you will find it all.

 

Dont you think I would wouldn't be able to see the the touchscreen or I would be getting some kind of error message in device manager though?

 

Don't remember the thread but cf-29 touchscreens have been fixed by removing and reinserting the flat control cable located under the lcd lid

Edit; Here's the thread

http://forum.notebookreview.com/showthread.php?t=288352

Alex

 

How to you get the back of the LCD off? I pulled all the screws and the bottom was still somewhat attached and i didnt want to force it.

 

you need to remove the keyboard bezel (4 screws above the lenght of the keyboard) and then remove the hinge covers (4 screws for each hinge; 2 front and 2 back) before you can remove the LCD lid all the way.

 

Has anyone posted pictures of what I am looking for?

 

Not that I am aware of. If I get time later tonight I will do just that for you. But the keyboard bezel is easy. If you look above your Fkeys you will see a long skinny plastic piece with 4 screws holding it down running the length of the keyboard. Simply remove those 4 screws and gently, but forcefully, pry up the keyboard bezel. It is not hard at all, but is plastic and the length can make it prone to breakage. You will notice with this out, you would then be able to remove the keyboard; it sort of locks the keyboard in place. Once the bevel is removed, you will see 4 more screws, two on the left, and two on the right. These hold the hing cover in place on the LCD side. Remove those 4 screws; then turning your toughbook around to look at the back of the LCD, you will see two more screws on the left, and two more on the right; again hold the back side of the hinge cover on. Remove those 4 screws as well. Once all 8 screws are removed, open your LCD all the way flat, with keyboard facing up, and you will be able to easily lift the hinge covers off. With those off, you will now be able to remove the LCD lid completely. Again, a very easy process.

Hope this helps.

 

I have just done this procedure to my MK4 which has developed this problem with no joy. Do I need to mess with any cable other than the 4 lead ZIF ribbon cable on the right hand side? That's the only touchscreen cable I can see. I know, I'm going to do some searching and reading.
CAP

 

That is the only touchscreen cable...

 

I think I'm going to crack it open only to find that everything is fine

The computer is NICE! But the touchscreen doesn't work at all now... all of a sudden. Any more ideas?

 

So yesterday my touchscreen just started working again... perfectly.... then today it stopped again. I opened the lid up, pushed in all the connectors, but didn't bring it back up. Any other connectors to check?

 

I too am suddenly having this issue. Except I have a 1.6GHz where the pointer retreated to the right lower corner. To me this means there is crud in the corner that needs to be fished out... Which I did. No joy... So I swapped Touchscreen controllers (Even though I didn't think it was truly the issue.) Still no joy. So I swapped back in the other controller and took out the LCD so I could inspect the back of the touchscreen to see if there was something lodged in between the screen and bezel... There were a few things... I loosened them up and blew them out with compressed air. I cleaned everything back up, reassembled everything and now NOTHING! It won't even retreat to the lower right corner any more....

I guess were all in the same boat. Or maybe different ones but all headed to the same place!

 

I feel ya, I left work early because I was having the same problem on 3 or 4 of my machines and they finally drove me over the edge.

Didn't feel like being stuck in Houston traffic, driving a standard with no radio being super pi$$ed off. yeah that wouldn't end well

 

Do you guys know where the detectors plug into the motherboard and the easiest way to get to them? Too me it seems like my problem is probably a loose connector, but I checked all the connectors under the lid and they were fine.

 

The whole LCD assembly plugs into the the mobo with 2 plugs located behind the panel underneath the keyboard. I would think if you had a loose connection there your LCD would be doing weird crap too

Dan

 

Hey Rick - Did you check the FOAD timer IC?

mnem
I think we're on Rev. 4.20 now...