I would lay it down flat on a table face down to make sure the casing wasn't bent then the other two things I would check are that the little speaker assembly at the bottom of the unit is put properly under the lip and second that the metal piece that is affixed to the top of the digitizer is placed correctly.
May not be digitizer related, but could certainly be related to digitizer repair. A good tug on the LCD cable could cause damage. I would find a reputable vendor that allows returns and purchase the new bezel clips, LCD cable, and LCD all from the same person. You're going to use the clips regardless, test the cable without closing the unit, if the condition persists use the lcd and return the cable.
Don't mean to belittle at all, but just to make sure - Are you not getting a sync? The LCD connector is a bit of a pain and can appear to be in place when it's really just wedged in an odd position. Perhaps you began the repair on a very low battery and we are simply getting no power. Also watch as the digitizer cable if not folded over on itself can become easily damaged.
Good way to check whether dock connector or not is to simply jump the contact pads with a screwdriver. If you get the same result as if you had pressed the button. then your problem is in the flex. Another common mistake I've seen people make during screen repairs is simply pressing the prongs down during screen removal. Since it's not outright damaged it often gets overlooked, but if they are compressed they will not be making a connection.
I've had success taking the smallest dab of epoxy/super glue and letting it cure for a minute or so. if you want to ghetto up the phone a little bit, grab a screw from the connector shield directly to the left as you'll need at least one screw in the vibrator.
Need to make sure you're going between the edging and the metal. Personally i use a razor blade and feel out clip locations and wedge it between the clips then gently pry up. Are you attempting removal to get to the battery?
Can be found stateside for ~$50-$100 http://eshop.macsales.com/item/Apple/MBP... Be very careful in separating the two pieces as you do not want to scratch the LCD. Use ample heat and take your time. I use my old business cards to keep the glass separated so it doesn't re-adhere. For reapplying I use a 3M Laminate adhesive and upon re-seating the glass cover it with something that won't scratch your new close and place a magnet or something of moderate weight on the edge of the screen.