Touchscreen pointer jumps to right edge

**sniiki** · 03-13-2008, 11:00 AM

Received this private message:

Originally Posted by rsema

hey i have the same exact touchscreen as you do and mine jumps to about an inch below the center of the screen so its not completely at the edge...just recently stays near the top right and move a little bit making the right click box pop up..i was wondering if you could tell me in more detail what you did to fix it as i think my problem may have the same solution as yours.
thanks....ryan

also...what drivers are you using?

Unfortunately I have to say again that the the problem wasn't solved

But it does it a lot less now.

I think the final reason is indeed that the touch panel is poor quality and that the problem has something to do with the conductive film of the panel. It's either broken or then somehow touching other layers of the panel structure, I don't know.

Reason for the previously discribed behaviour (pointer jumps right where I touch, not between the problem point and touch point) is, I believe, that the false reading is so weak compared to the touch of finger. That's why it also does that odd twitching when touching the panel very gently.

Solution for this problem?
Well.. you could try to find a place that fixes the problem when pressed and then try to apply a constant pressure there by stuffing matter between the case frame and touch panel or between tha lcd and touch panel.

New panels from China really are cheap but I don't know if it's worth of ordering as they're prolly the same crap as this one.

rsema: btw where did you purchase your screen? Have you contacted the company who ever sold it and if, have they responsed anything?

PS: the brand of the LCD is NiceView or atleast it's sold with that name in some sites...

PS PS: Is there any electronics guru around here who would know how to reduce the sensitivity of the panel? So maybe that way I'd get rid of the "ghost touch". Adding some more resistance won't help anything as it measures the change, not absolute value right?

**rsema** · 03-13-2008, 01:26 PM

hey thanks for the response...as I have already opened the case before...i dont think i could get a replacement...i got mine from greatdeals18.com...today i noticed that when i touched the screen it just jumps all over the place and occassionally right clicks and twitches in the top right hand corner while not even touching it...sometimes i cant even see the pointer untill i touch the screen...im going to take it apart today and see if it does it while out of the bezel...good luck and i will keep yall posted on what happens...

**rsema** · 03-13-2008, 06:32 PM

hey i took the screen completely apart and just got the actual touchscreen panel assembly off of the lcd and plugged it in to a different computer screen and the same happened...just jumps all over the damn place and right clicks and clicks and all kinds of ****...took a look at the circuit board and i couldnt see anything burnt or shorted out so
WTF!!! O welll ill have to look into getting a replacement panel or controller...now i need to find out which one is bad...im thinking its the actual panel not sending signals right but who knows...
good luck and i hope someone finds a solution...

**sniiki** · 03-14-2008, 05:34 AM

I gave up and ordered new panel + controller from Hong Kong.
(http://stores.ebay.com/SCB-PICs. 57$ including shipping, and replied to my mail in a minute and it wasn't autoreply as you have to mail them which size you want, hope it'll ship as fast

)

I could live with this one as it usually works fine but when it starts screwing around, I have to press the panel so hard that I'm afraid that the LCD will get damaged if I continue that as I already got that one blue vertical line there on time.

I'll update this thread if anything special occurs.

Good luck rsema, and thanks everyone for the help!

**rsema** · 03-14-2008, 04:33 PM

hey man do you mind if i have your old one...as we might have different parts messed up and i could interchange...thanks

**sniiki** · 03-15-2008, 06:08 AM

Originally Posted by rsema

hey man do you mind if i have your old one...as we might have different parts messed up and i could interchange...thanks

I think I have use for it in some diy projects and anyways, I think you problem is also the touch element it self

But why shouldn't you order another new from ebay too? It doesn't cost much more than shipping this damaged one from finland

**ShawJohn** · 03-15-2008, 08:49 AM

Sounds to me like the same problem the 7" lilliputs get. The touchscreen overlay becomes delaminated as the glue holding it all together melts when the screen gets too hot. Its starts off erratic, then eventually the whole right hand side of the touchscreen will stop working. This problem was acknowledged by Mo @ Lilliput UK Tech support.

Well known fault on Lilli's. Only known fix is replacement overlay, costs about £40 IIRC from Armen @ digitalww.com

You'd have thought screen would have come on more than they have in the last 4 years!

**sniiki** · 03-15-2008, 04:28 PM

I really wonder why these small panels run so damn hot. I mean this get REALLY hot and all desktop monitors stay really cool, barely warms at all.

Maybe I should install thin fan on the back side..

**rsema** · 03-16-2008, 06:04 AM

yeah i will second you on the fan...ill take pictures and post them and let you know how it works...be about a week though since i am going to have to wait for the parts...
snikki: has the place shipped your panel yet?
thanks for the help

**sniiki** · 03-16-2008, 07:05 AM

Originally Posted by rsema

snikki: has the place shipped your panel yet?

Think not as they sent some confirmation email yesterday but hopefully it will ship on monday.

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