Chosen Solution
Okay so let me start by saying my dad left this ipad on the roof of his car and drove off. Shattered it and chipped the metal housing. I’ve changed all the boards to a new housing and I’ve got a new LCD and digitizer touchscreen for it. I’m also assuming the battery was toast so I took it out too. Now to test, I put the screen in and had the cables plugged in, and when I plug the charger to it, the screen doesn’t come on. Now that’s my problem. Even without the battery as long as it’s getting power it should come on right? I’ve tried plugging it into my wall charger, my computer, and my external battery that even has an ipad charging mode and nothing, the screen doesn’t come on and the computer doesn’t recognize that anything is plugged in. I’ve even checked that the charging port is plugged in.
Assuming you re-checked all connections, do you have a multi-meter handy? If you do, you can check the charging port connector to see how much power is going through, while you have the multi-meter out I would also test the battery the same way to see how many volts it’s putting out. This will help you rule out if its battery or charging port first. If you can’t find any issues with either component, then you can check another LCD to make sure it isn’t defective. If you are positive that the LCD works, then you should shine a flashlight in the middle of the LCD, with the charger plugged in, and check for faint images. (Click the power button on several times, hold power and home etc.) If you can see an image, then you have backlight problems, which I’m sure there are several threads on. If not, you would most likely be looking at possible IC “chip” issues.
