Answer to: Can the Internal Kingston eMMC be replaced?I've looked into replacing the eMMC on my 16GB, and if you could 'dd' the contents of the old chip onto the new one, it could be done. Unfortunately the chip is gunked pretty good down on the board (glue on and under the edges of the chip) so i've left the idea of getting the only 64 GB N7 in the world, maybe if i come across a cheap motherboard i will try to do it. There is 4 strapping resistors on the board somewhere, these tells the processor if it's connected to a eMMC chip in 8 bit mode (default in the N7) or another variant. It can be programmed to use a standard SD-card, so in theory, you should be able to remove the BGA, solder on some extremely fine wire and to a SD card socket, re-arrange the strapping resistors and make it work. I have access to a professional BGA rework station and can reball parts, but i won't try on my own N7 // Per.
Answer to: 4 wire or 5 wire?Neither. It uses a Capacitive touch screen which uses a LOT of connections to the mother board. I would guess there is between 40 and 50 connections from the glass substrate to the motherboard thru the 2 connectors.
Answer to: Can I upgrade the display to 1920x1200?I have done it. Work in progress pictures of the MOD I took an WUXGA panel from an IBM T61p computer, modified the EDID EPROM on it a bit, and the computer would talk to it. I wanted to mount the panel on my A1226-machine, so the LCD cable and all would not be a fit, so i got an Display cable from an A1150 (1Gen Macbook Pro) and a Display bezel from an A1150 too. With these parts you can mount the panel in the case. But there is still som backlight to figure out, so i got myself an LCD panel from the A1226-model with LED backlight (broken panel, 15$) and ripped off the LED's and put them in the T61p-panel instead of the CCFL tube. You need to solder the LED strip's 7 connection to the LED inverter in the A1226 and i would not advice anyone to undertake this unless they are an expert at soldering. // Per.