Ewaste adventures - LED Monitor Disassembly

Found a 27" LED monitor in an e-waste bin.

How it works:
LED monitors are actually a type of LCD (liquid crystal display) monitor whose backlight is generated from LEDs instead of CCFLs (cold cathode fluorescent lamp).

The LCD contains a large matrix of pixels, each being electrically controlled to pass the white backlight to varying degrees. For example, to produce a black color pixel, no light is allowed to pass. For a white pixel, all light is allowed to pass.

LG Flatron 27EA63V
19V DC, 1.6A external power supply (didn't come with unit)
Manufactured June 2013
Factory ID: LGDGZ (Dongguan?)

DVI, VGA, HDMI, audio ports on the back.
takes external power adaptor. most monitors i've come across have the switching power supply within the unit.

Screen is damaged. Would love to power up this unit but it didn't come with a power adaptor.

Strange, just one screw. How do we take this thing apart?

Pry it apart with a flathead screwdriver.
If you plan to put it back together nicely, tape the head of screwdriver and don't damage the cable bundle that runs to the front buttons!

Back cover removed

As expected we find on the mainboard:
- 1 controller chip [Novatek]
- 1 crystal oscillator for the pixel clock [TROQ 14.3 (MHz?)]
- a few large electrolytic capacitors and the odd inductor
- a large mosfet [D478 chip]
- several small ICs (listed below)
- many small SMT components
Pixel clock explained: https://www.reference.com/technology/pixel-clock-a45118adc9e2c844

Small ICs:
- TI 54339E buck converter (http://www.ti.com/lit/ds/symlink/tps54339e.pdf)
- 8839BMP-C ?
- Winbond ?
the text on these chips are tiny! i'm guessing they are for voltage regulation.

Lift tab to release the mainboard to LCD ribbon cable


LCD matrix controller board (as seen from rear)


LCD matrix controller board (as seen from front)

The backlight LEDs are in a row at the bottom of the screen. This means its an edge-lit display.
Edge-lit vs full aray: http://www.digitaltrends.com/home-theater/led-vs-lcd-tvs/)

Disassembled display. The pieces, from back to front:
1. the LCD screen itself
2. a "plastic sheet that passes light away from the screen much better than towards it" (anyone know of the proper name?)

3. two light diffusing sheets, for diffusing the backlight. (https://www.inventables.com/technologies/light-diffuser-film-rolls)

4. a "rigid transparent piece of plastic" (is this also to help diffuse the backlight?)
5. a white plastic sheet.

2. The "plastic sheet that passes light away from the screen much better than towards it" (anyone know what this is called?) Left: reversed orientation. Right: correct orientation.

4. "rigid transparent piece of plastic" (anyone know what this is called?)