[Nexus 4 General] tnap1979:
So... Your prolly wondering just exactly what I'm doing here from the title description.

Well, I have 2 devices that I acquired through working at a repair shop,

First, the LG Optimus g e973 32gb - dead board needing JTAG repair, our shop doesn't do jtag.

So I acquired it for my personal parts collection..

Second, the LG Nexus 4 E960 8gb - busted back glass, punctured lipo cell from back glass, scratched front glass and a portion of the left most touch sensor not working, dead external speaker, rear camera lens scratched.. Possibly more..

Another parts doner

So I noticed that both devices seemed of similar layout and size and everything looked identical other then casings

Began lookup of logic board pics and parts of both devices and noticed that they are VERY similar in that they share same parts.. Both rear camera modules have identical ribbon connection and physical size, same with front cam modules and headset jacks cept the nexus 4 headset jack is slightly angled, charger ports and all.. Just casings and antennae placement and NFC/qi charge pad are different

Took both phones apart to the last piece and screw one on left other on right,

I grabbed the casing/lcd, vibration motor, cameras, headset jack, battery from the Optimus,

I grabbed the logic board, bottom speaker/rf plastic, usb/rf module, rf antenna wire, upper half of the plastic support plate that helps hold logic board in, power button, sim tray, peeled off the antennae from the nexus backplate

Assembly...

After several test fits of all the parts to check for tolerances and placements,

I started with the E973 backplate, I removed its NFC pad and all of its antennae, had to dremel off the screw mounts that keep the device together with the tobackplate, peeled off the E973 imei label and stuck it to its own logic board, took imei label off nexus plate and put into E973 backplate, several attempts later I finally get all the antennae and the NFC/qi pad installed on the backplate.. Now the backplate portion of phone is complete..

LCD and logic board mating time.

I test fitted the logic board from nexus to the LCD and touch connections and power button only of the E973, connect battery, hit power, board boots and google logo, lollipop animation, desktop, touch responds, good to go from here

So I notice a few spots that needed light dremeling to allow the slightly differently shaped nexus board to fit proper, now its seated and connected to the LCD and touch, I connect the front cam, back cam, headset modules, and do another test boot, boots again and I test the E973 camera modules on the nexus board, everything is perfect working, headset works, ambient sensors work.

Next is USB RF board placement, some more dremeling around the charger port area of the E973 casing, removed the light defuser from the E973s capacitive home button, dremeled the nexus rf antenna and speaker plate to fit proper and cover the usb section and no i did not need to touch the antenna conductor paint on the plastic :)

Then connected that usb rf board to logic board, did another boot and charge and led test, all success still so far

So now with all major components tested and working it was on to final assembly

Some more minor dremel work and razor trimming and soldering of volume and power buttons to logic board as they didn't match from nexus to optimus some more tolerance checks and trimming and finally case closed with a bit of bulge at bottom near USB port and near back camera.. Just a few more checks and it will be perfect

Unit boots up, everything functions, and now instead of two dead devices, I have a hybrid working Frankenstein Nexus

I'll update with a video but here is a few pics if they allow them