LCD not turning on after switching logic board

Logic circuitry....ahhh what a headache it can conjure from a well placed plan.

If your certain that you have made all the correct connections and screws and so forth, Pull the battery.

And leave it out overnight. Logic circuitry is composed of thousands, tens of thousands, well a lot of micro capacitors. These are for the purpose of filtering, charging-discharging ect... It is not unheard of that when your doing what your doing, the charge states could get mixed up across the circuit and in a way create confusion to the other parts. Hard to explain.

I had a graphics card years ago that was a high end card. $300.00

I was experimenting with overclocking it and, well, the screen went-gone. Blank!

I was hoping I just overheated it some and gave it some time to cool.

I shut every thing down for a while and powered back up and....nothing.

Schux!

Fried my good card. Put the old card back in and thought maybe Best Buy might honor it as defective.

A few days later, I finally was going towards that part of town and I had the card already in the car and...I, thought..maybe - try it one more time.

And well, it worked. Worked fine.

I have had this happen before with other things composed of logic circuits.

Remove all sources of power and let sit for........a day, two, I don't know. Just long enough to let the micro-capacitors to slowly drain to nothing.

Any one who thinks differently apparently has much too discover yet.

Not that this is the solution but is a simple procedure that can be tried by the most unskilled of unskilled...not that I think your unskilled!

It takes skill just to have faith in your self to do what you are experimenting with. Keep it up!!!