I'm certain it's the Vee rail. LCD board problems manifest as:

* Block of pixels out
* Line or row of pixels out

or sometimes

* All pixels out -- but this could be LCD board or main board.

-Josh

On Mon, Jan 7, 2019 at 2:32 PM Jim Anderson <[email protected]> wrote:
>
> I just realized I could half-answer my own question by trying my LCD board on 
> one of my kids' M100s.  Can't do it right now because I'm at work, but at 
> least then I'd know whether the problem is on the LCD board or not.
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>         jim
>

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