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First, a freezing problem or lock-up during boot-up has nothing to do with the LCD display. If the screens shows a graphic, such as the Garmin logo and without lines or splotches, then the screen is fine. Lock-ups during boot-up are caused by corrupted firmware or maps or a corrupted flash drive. All of which can be resolved without taking the unit apart. The battery has nothing to do with it either. If the unit locks up while connected to the car charger, then the battery is essentially being charged and not powering the unit. I can't see your board but if you pulled the ribbon out of the board, you may have damaged the locking latch that holds the ribbon in place. The locking latch is a thin white or rust-colored strip of plastic on a hinge. That hinge should be up when sliding the flex cable into the connector, then the locking latch is pushed down toward the flex cable until you hear it click. The flex cable should be secured at this point. If you have busted the locking latch off, it is game over for your Nuvi. More info on booting issues can be found here:
There are small screws on the silver end pieces that hold the 2 pieces together. You have to completely take the phone apart top and bottom take the end piece out of the hinge and very carefully slide the flex cable through. Go to HowardForums and look for a tutorial there.
To remove the slider mechanism, take out the 4 visible screws first (under the battery cover).Then on the back of the phone at the bottom, remove the 2 little rubber circles with a tiny flat head screwdriver to reveal 2 more screws, take those out.Take out the 2 screws on either side of the flex cable that is coming out just below the battery compartment. Next is the part that took me hours to figure out. L Beneath where the battery sits is a long oval shaped thing (=======)<- looks something like that (sorry I don't have pictures).This is actually a sticker.Peel this up and remove the 2 screws under it (keep the sticker intact becase you will need to replace it later).This will detach the slider from the phone.Make sure to gently disconnect the flex cable from the mainboard first.
From there you can see more screws that will help you take apart the sliding part of the phone to access the lcd screen if you need to replace it (which is what I was doing).It's pretty easy from there to get everything else apart.Make sure when you disconnect the cables from the back of the LCD screen, that you flip up the little release tabs on the connectors first.
I was able to take apart a VX8350 I have with a broken screen. I don't see any way to replace just the hinges with replacing the whole top part of the phone including the screen. The ribbon cable from the screen runs through the hinge part into the main assembly of the phone. It appears the cable can't be removed without cutting it.
that hole on that model is for a locking screw, the locking screw is installed to minimize theft and for other precautions. If the face plate is having any odd reactions its normally do to the flex cable. The best sign for a dying or dead flex cable is at the joint. The joint can be viewed at the point when you remove the face plate. Immediately after pulling the face plate off look behind the pivoting frame at the orange colored ribbon, you should only be able to see a small portion of it. If there is any sign of a yellowy residue its a sign that the protective covering of the ribbon is deteriorating. A bad flex cable is everything on the moving face plates.
Take off your battery, unscrew the screws on the back of the phone with
a T6 screw driver.
Pry off the back plate,lift up circuit board
gently(be mindful of flex cable) remove the flex cable from mail board
by lifting brown part by the connector,
Unscrew then next 2 set of
screws(be careful of flex cable!) remove the LCD board from the
Now put the LCD Panel into the new faceplate. Find the new
back slide and put your sliding rails on.(you may also put the slide
magnets on from the old housing) carefully thread your flex cable
through the opening.
Snap the Back slider on and then screw in the
screws, then take the keypad housing and screw it into the slide rails.
Reconnect the flex cable by putting the brown hatch up(gently with
finger nail) gently feeding the cable into the connector until the white
line is about to the end of the connector.
Then put the brown thing
down and apply little pressure.
Put the mail circuit board back into
the phone with the headset jack going in first.
Then snap it back into
Transfer your speaker over the the new back housing with the
prongs facing up.
Your flex cable has most likely gone bad. If the phone is under 1 yr. old I would suggest have it repaired by a warranty repair facility. If you are going to try replacing yourself let me know, I will try to help w/ disassembly. Good luck.