If you want to buy a replacement screen, screwdrivers and other parts, you can order from us
here -
LG KC780 Reina LCD screen
Tools required for disassembly: Phillips screwdriver, plastic tool such as a guitar
plectrum or credit card.
Remove your back cover, battery, sim and memory card. Four screws
need to be removed (circled below).

Run something like a credit card around the join of the battery
compartment to release it from the rest of the phone.

With the battery compartment removed your phone should look like
below. Circled in the picture below is the ringer. This is attached to
the circuit board by two quite delicate wires. You need to carefully
lever this off the phone. It's stuck down with double sided tape and
will come away quite easily but be careful not to break the wires. Once
the ringer is loose, lift the circuit board from the point indicated by
the arrow. A little force is required.

Pull the circuit board away from the main body of the phone. You'll
see that it's still attached by a black ribbon. The connector from this
ribbon attaches like a plug and socket. Just lever it away from the
circuit board to unplug. Note that when you lifted the circuit board up
in the previous stage another ribbon and connector were disconnected and
the ribbon is circled below. Make sure you reconnect this when you put
the phone back together.

You can now lift the circuit board away from the phone, as shown
below.

Now open the slide and you'll have access to two screws, circled
near the bottom of the picture below. There are also two screws near the
top of the phone that need to be removed (two stickers covers these
screws). Now hold the front cover tight and push the black part down, as
indicated by the arrow. Some force is required. This will make a gap of
about 1mm at the top of the phone and releases the clips that hold the
slide in place. Pull the slide down and it'll come loose. Slide the
black ribbon through the gap in the slide.

The slide is now separated from the front of the phone. A ribbon
connector (circled left) needs to be disconnected. It attaches like a
plug and socket. Just lever this up to unplug. Another connector (circled right) needs to be released. For now, all you
need to do is remove the blue tape and flick the black latch up then
peel back the metallic gold sticker.

Pull the green circuit board down and away from the phone, as shown
below.

Lift the black rubber part away from the top of the phone, as shown
below. Now starting from where the arrow indicates in the picture below,
carefully peel the orange ribbon from the back of the LCD screen. Once
you've removed the ribbon you can lever the screen out. There is a
recess in the cover (circled) to allow this.

You now have the LCD screen removed. Reverse the whole procedure for
reassembly.
Please read the note below.
Note: When I took my phone apart a small piece of metal fell
out (circled below, right). This is a magnet and without it the phone
will not know whether the slide is open or closed. If this part falls
out make sure it goes back in place. I used some double sided tape to
hold it in. If you've found this disassembly guide useful, please support formymobile.co.uk and order the tools and parts you need from our site. We ship worldwide!
If you have any questions about how to take apart and repair your broken LG KC780 Reina, email
rob.lee@formymobile.co.uk. Or post a comment below for further help with
LG KC780 Reina disassembly.
If you want to buy a replacement screen, screwdrivers and other parts, you can order from us
here -
LG KC780 Reina LCD screen