Question DIY monitor from old laptop LCD

Jerahya

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Jul 23, 2016
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Basically I got this old dead dell studio 1458 just lying around so I though of reusing its LCD and turn it to a portable monitor or secondary monitor or something. I just want to see what I can do with it. Now I lack most of the basic knowledge about electronics but somehow able to repair other electronics and stuffs just through research. I'm just trying this one out as part of my hobby.

I got a basic LVDS LCD universal controller board which takes 5v.
this one https://www.aliexpress.com/item/32806988374.html
And dell studio 1458 LCD is a 40 pin so the 30pin LVDS cable that comes with the controller board that I order the cable for it.
The cable I've ordered is 40 pin I-pex 2 ch 6bit cable. Not sure if its the right one since looking for cable there are a couple of cables for 40 pins and I just went for it. and if it doesn't work then I'll just order the 1 ch 6bit or just switch and remove the pins for it.

Now unlike 30 pin which I think uses ccfl for backlight, 40 pin uses LED right? which means I don't need to hook an inverter to the display backlight.
The cable I ordered has a separate connection for the backlight
View: https://i.imgur.com/CHfQbkm.png

I think white wire handles screen brightness so I can connect it directly to he boards.
what I'm not sure is the LCD backlight voltage. Does it take 5v or 12v or something else. If it does take 5v then I can get a 5v power adapter and maybe connect the board and the backlight directly to it. if it takes more than 5v then I can get a power adapter that gives 12v or more for the LED backlight and use stepdown to power the board which uses 5v.

What voltage does a 40 pin LED panel take for its backlight or it depends with the panel.
 

Ralston18

Titan
Moderator
For the project you have in mind it is probably time for you to learn how to read and understand circuit diagrams.

Schematics/pinouts that explain each pin and what it does.

I did some googling with respect to your 1458 and found a number of websites. Some of which probably should be avoided.

This link may be viable but there is no way to really know what they can provide without paying them.

http://schematiconline.blogspot.com/2012/06/dell-studio-1458-schematic-h900-main.html

Therefore I am not recommending or endorsing the link per se. Just using it as an example.

Plus the referenced link appears to be dead.

So take closer look at that Dell 1458 - may be just branded and you may be able to identify the original manufacturer and then obtain the pinouts.

But do remember even if you get the physical connectivity all worked out you will still need the applicable video drivers to get an image to the LCD using the VGA port perhaps.

May work well with some Raspberry Pi project. Check some of those project websites. You may find exactly what you need.
 
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Jerahya

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Jul 23, 2016
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yah, I figured no here knows the specific voltage or at least no one who knows didn't drop by this thread yet. I can read schematics but for circuit with lots of different components I need to do some tracing.

Thanks for the schematic.
 

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