[AT&T LG Optimus G] ripin150:
UPDATE: So, the digitizer I bought developed a massive dead zone. I already contacted the amazon store I bought it from, they're replacing it for me. Why does this matter? Because now I get to update this post with pictures/video! So, yeah, I guess this guide should get a lot more helpful soon.

Update 2: Ok, so, I don't even know how to express my anger and frustration. This girl at work shoved my phone out of my hands and into the leg of a table, completely destroying my phone. So, yeah, sorry, I guess I won't be updating with pictures/video, because the amazon store isn't going to take the screen back now.

Yo, guys. If anyone noticed that I was gone, I'm flattered, since I don't post a lot. But yeah, I havent had my Optimus G in about a month, so I havent been on this forum. In that time, I went through my Second Motorola Atrix HD, a broken Galaxy S3, and even lived through Google Voice on my computer. It's an extremely long story, and kind of ridiculous, so I'll spare the details.

HOWEVER, I did finally just buy a replacement Digitizer and LCD screen, and successfully installed it, and I want to share tips for anyone doing it themselves.

When removing the back, after you've removed torx screws, start prying the back off from in between where the Sim card and MicroSD go. Where the back of the phone and the chassis of the phone are separate is much more obvious in that cavity, PLUS dents/dings from jamming a screwdriver in there wont be noticeable when you put the bay cover back on.

Don't force anything off. Make sure you've removed every screw, unclipped every clip, and removed ribbons from everything you're trying to take off.

Removing the battery is tricky. Be careful not to deform it too much, cause that's dangerous. But there are 2 strips of double sided tape running horizontally beneath the battery. Try to get something between the top one and the battery, then carefully pull the battery off the second strip with your hands. sticking too much stuff beneath it to pry it up is going to cause some trouble, so lifting it with your fingers might be better.

Remove the motherboard. detatch all the ribbons, antennae, everything, then pull up from the left, then slide left and out. This is how I got it out with the least resistance, but there is no science to it. If you've gotten this far, you can figure out how to pull it out without breaking it in half.

Components that need to be removed before LCD+Digitizer removal:

Motherboard

Battery

Camera

Just put them off to the side, you don't want them damaged during the next part.

WARNING! If you plan on saving your LCD screen, DO NOT DO THIS. The high heat will cook your screen and make it unusable. Only do this to remove a broken or unsavable Digitizer+LCD.

Alright, now pull out the heat gun. Alternatively, you can do what I did, and use a hair dryer. Not even kidding, this will work fine, and will be hilarious when you tell your friends about it.

On a high heat, start heating the screen. If you're using a heat gun, just do your thing, you know how it works. Hair dryer folks, keep the dryer very low to the phone, low enough to feel the dryer being pushed up by the air, holding it just high enough so it sort of hovers. (You'll know what I mean when you try it. If you don't, just keep it about half an inch off the phone.) Move the dryer along the edges of the screen, all the way around, thats where the glue is. It should heat up pretty fast.

Using your pry tool, start at the speaker grill and pry all the way around the phone. lifting just slightly upwards. If it's not extremely easy, apply more heat. Work all the way around, then pull the screen off. Be careful, it's likely you'll shatter the screen even more at this part if you're not careful. User Bozwell had an excellent suggestion (post 4), cover your screen in tape, then begin separating the screen to keep from getting glass everywhere. Great idea, Boz!

Alright, so from here on out, it's just reassembling your phone correctly. Piece o cake.

Firstly, put your new screen in. If it came with adhesive, it's up to you if you want to apply it now. I'd think you probably have to, but up to you.

If you're like me, and no adhesive was provided, hold off on doing anything for now. Just put the screen in the hole, and thread the ribbons through.

The motherboard lines up with some contacts on the chassis in a few places, but most importantly, there is a connection on the top left corner of the body, and the UNDERSIDE of the motherboard that needs to be made. I believe it's proximity sensor, but not sure. It's very difficult to tell if its attached, but look at what I'm describing, and try your best to mate them.

Don't forget ANY cables. Like, that's pretty obvious, but even when you're sure you didnt forget any, check again. The camera's ribbon is underneath the screen's, don't forget that one. I reassebled the whole thing, everything was working perfectly, except I no longer had any mobile connection. I couldn't imagine what I'd broken, since that's a whole different area, but going to phone status and checking my signal strength revealed I forgot to reconnect the white antennae (status showed my signal at -200,000 dbm). So, double check, because the more often you have to reopen your phone, the more flimsy it's going to get.

Alright, screw the plastic shielding back on, reconnect your battery, then flip the phone to be face up. Power it on, test the screen to make sure it's functional. If all is well, power off and glue the screen in. What I did, and I welcome anyone to tell me a better glue type or method, is plain ol Super glue along all the edges where the old glue was. Press it in, flip it over, and while it's drying, finish reassembling the phone (should just be make sure everything is screwed in inside, then put back glass back on.

If your screen wasn't functional, I guess try to get it replaced by whoever you bought it from, and leave your phone disassembled for when it gets to your house.

Alright, that's pretty much the thick and thin of it, it genuinely isn't that hard of a replacement. I've done a number of digitizer/lcd replacements, not bad at all. I hope this helped anyone stuck or wondering about anything. This video can be used as a rough example, but it goes really fast.

Good Luck!