190
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Added some research info based on some multimeter pokes and some intentional shorts of random pins
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== LCD (old3DS bottom) ==
{| class="wikitable" border="1"
|-
! Pin number
! Name
! Description
|-
| 01
| -6V
|
|-
| 02
| 12V
|
|-
| 03
| CLK
| Pixel clock
|-
| 04
| /HBL
| Horizontal blank (low while blanking)
|-
| 05
| /VBL
| Vertical blank (low while blanking)
|-
| 06
| 2v2
| Loopback of pin 07?
|-
| 07
| 2v2
| Content latch? Shorting this to ground or to pin 06 will "lock" the screen memory while still allowing the screen to refresh itself.
|-
| 08
| GND
| "chassi" ground
|-
| 09
| HCL
| Horizontal clock
|-
| 10
| GND
| "chassi" ground
|-
| 11
| BIAS 1
| Default ~ 4.5V - 4.8V; sets contrast
|-
| 12
| BIAS 2
| Usually matches BIAS 1; sets "flicker"
|-
| 13
| ???
| Might be a transistor? Shorted to ground if off, 2.36V if on.
|-
| 14
| 6V
|
|-
| 15
| ???
| Loopback of pin 14 ? Shorting this with pin 14 or ground will make the 3DS turn off with a harsh pop sound.
|-
| 16
| ???
| ???
|-
| 17
| ???
| ???
|-
| 18
[...]
25
| RED 0
[...]
RED 7
| Red pixel bits
|-
| 26
| GND
| "chassi" ground
|-
| 27
[...]
34
| BLUE 7
[...]
BLUE 0
| Blue pixel bits
|-
| 35
| GND
| "chassi" ground
|-
| 36
[...]
43
| GREEN 7
[...]
GREEN 0
| Green pixel bits
|}
