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Laptop Display Upgrade to Touch? Answered

I wish to upgrade my Laptop Display from Non Touch to Touch. I did a bit of research on the internet, but am unable to find a proper answer. Is it possible?

I would love to migrate from half HD non touch display to full HD touch display (even IPS). But here in India, I'm unable to find it in this config for 15.6" size (atleast, not cheaply).
I have found one display which has a few things common with my old display. Both have TFT with LED Backlight, same size, aspect ratio, resolution and no of pins.

Old Display:
15.6 inch TFT with LED Backlight (Non touch) (16:9). Resolution: 1366 x 768. 40 Pins.
Part Number: B156XW04V5
Datasheet: https://www.olimex.com/Products/OLinuXino/A20/A20-LCD15.6/resources/B156XW04V5.pdf
Cost: ₹5000 ($75 approx)

Proposed New Display:
15.6 inch TFT with LED Backlight (Touch) (16:9). Resolution: 1366 x 768. 40 Pins.
Part Number: B156XTT01
Datasheet: http://www.datasheetspdf.com/datasheet/download.php?id=923648
Cost: ₹12500 ($180 approx)

Would I need to change LVDS cable as well?
Existing LVDS Cable:
Part Number: P5LJ0
Datasheet: http://www.s-manuals.com/pdf/motherboard/compal/compal_la-7221p_r1.0_schematics.pdf

Here are the answers to some questions you might have:
1. Laptop is Acer Aspire TimelineX 5830TG.
2. My Laptop did not have any variant with 1080p display or touch display.
3. The old display is slightly cracked. Hence I need to change it anyway.
4. The top flap, display mounting brackets and bezel are damaged too. And the laptop is 5 years old and am unable to get the replacement parts. Hence I am planning on building a new housing for the new display, in any case. (Suggestions in this regard are also welcome)
So a bit of variation in physical dimensions is not a problem.
5. Motherboard is Intel i5 2410M with Intel 3000 graphics processor. Graphics Card is Nvidia 540M. (I couldn't find supported resolutions on official websites, but according to 3rd Party websites, both should support 1080p)
6. I have some experience with Electronic Disassembly and Assembly.
7. I can do soldering, but I'm not very good at it. Hence, would like to avoid it, if possible.



2 years ago

I think the screen change, software weave to useful finger action and contingencies is way beyond your skill level but great for practical experience !


Answer 2 years ago

Ya, I agree it would be difficult and my skill level are certainly doubtable.
But in my opinion, if it feasible, it has to be done. It would make it a very popular DIY.
Hence, I'm here to seek help with people who know stuff and may help me in completing the project.

Please give your suggestions on the feasibility.


Answer 2 years ago

There are glass covers that you can find that give X,Y finger position.

Place the detect glass over your monitor and using a micro-processor of your choosing, write a program that simulates a mouse press at the finger location. Feed that into the mouse port and it should work with all your programs...

I have such a screen which you can have free of charge (I will never use it) just PM me for details and agree to pay for the shipping....


Answer 2 years ago

That's very nice of you.
Let me dig in a bit first and check the feasibility on built-in touch displays. If in the end, it turns out to be a dud, I'll ping you. Thanks.


2 years ago

There are a few problems with your idea:
a) If the display is no match for the display driver board (not the graphics card!) then it won't at all - you can only try as you ID for the screen is quite close to the original.
b) With no touch support on the original I fail to see how you can make it work as there won't be any hardware support for it on your motherboard.

The only feasable option I see is to use the HDMI port and a TV screen.
for the touch you can always add a frame similar to these here.


Answer 2 years ago

Forgive me, if I'm answering like a noob.

I googled the model numbers and the word 'control board'. Both gave the result for the same one: M.NT68676.2A
I understand this is an external board. Do laptops have same control boards built in?

In the service manual of my laptop, I couldn't find any solid leads to the display driver board. All i found under VGA are N12PGS (which I think is a code name for the graphics card) and some internal part numbers of Acer.

And if the laptop has the same board, would it not support touch too? Or the control board for touch is an additional one?

If interested in checking the service manual, here is the link: https://drive.google.com/file/d/0B-4pRLAw9tjcNk5IR3JsTk9TejA/view?usp=sharing