sleep and pristine unless, of course, it's shattered.

Replacement screens can cost almost as much as the watch itself unfortunately.

But what if replacing just the top glass were an option?

Today I'll show you that replacing just the glass is indeed an option...while at the same

time showing you why this repair should never be attempted by mere mortals.

Personally, I've tried multiple glass-only Apple watch repairs before this one, each

time failing catastrophically.

This time around I'll have some extra help from a guy who does this on a regular basis.

He's found a way to make these impossible repairs possible.

But still, without experience, I'd say about 99% of people who attempt this project will

fail.

Now that the pep talk is over, let's get started.

[Intro]

Removing just the glass on a smart watch or cell phone is like trying to separate two

potato chips that are glued together without cracking either one of them.

The concept of course is simple, but the execution is near impossible.

It's the brain surgery equivalent of smart phone repairs.

The initial trick is that the glass curved edge of the Apple Watch Series 4 does not

have any part of the display panel underneath it, nor does it have the finger sensing digitizer

under the curve.

It does however have a super fragile square ring around the bottom edge of the glass that

rests up against the metal for the Force Touch feature which is kind of essential to the

functionality of the watch.

I'll show you what that looks like in just a second.

This is going to be one of those videos you got to watch all the way through till the

end.

I'm not going to use any heat yet because heat can damage the Force Touch ring by causing

it to delaminate.

So I'm gently pulling away the tiny cold glass shards with my fine tip tweezers.

Is this tedious?

Yes.

But remember we are working around layers of technology that are more fragile than potato

chips, so slow and steady wins the race.

Once we have these smallest glass chips pulled away from the frame, we can slide a super

thin piece of stiff plastic between the glass screen and the Force Touch ring, taking special

care not to damage the fragile ring while sawing my plastic back and forth to help it

slip under the glass and slice through the adhesive that's holding it to the black Force

Touch sensor.

Pulling up a sliver of glass at the wrong angle can put pressure on the display that's

under the glass and destroy it.

It's like trying to diffuse a bomb that could obliterate the watch at any second.

Also keep in mind that holding down the side button for too long literally calls the police.

Ask me how I know.

Obviously, the more cracked the glass is, the easier it is to work on because tiny slivers

of glass can pull away easier.

If the display ends up breaking with black splotches or the touch sensitivity stops working,

the only option at that point is to replace the whole screen instead of just the glass,

which is what we're trying to do here today.

Remember, we still can't use heat yet because of that Force Touch ring – it's still adhered

to the metal frame.

Every now and then I would run into a snag along the glass edge requiring me to swap

out my piece of plastic or grab my tweezers to shimmy out another piece of glass.

I've been at it for about 45 minutes now, going slow and removing each bit of glass

individually.

These watches are expensive, but if I can salvage this screen by replacing just the

glass, I can save quite a bit of money.

I'll add each sliver of glass to my glass collection off to the side until I have another

opening big enough for the thin piece of plastic.

I'll pop it in and start slicing between the glass and the Force Touch ring.

This is a terribly tedious repair that I wouldn't wish upon my worst enemy.

It might be stressing you out a little bit that the watch is still turned on at this

point, but as long as I don't slice my plastic too deep into the watch, the inner cables

should be just fine...nothing's around the edge.

I'm leaving the watch turned on so I can easily test and see if I've broken the internal potato

chips or not.

Once that screen is broken, there's no point in continuing and I'm better off just buying

the whole screen replacement instead of just the glass.

Finally, after removing all the little slivers of glass and slicing my plastic under the

larger chunks of glass, the whole screen is loose from the Apple Watch body.

Everything is indeed still working at this point, which means we haven't messed up yet.

Cross your fingers it stays that way.

In order to proceed I need something called a vacuum hot plate.

This beauty can suction down objects while heating them up to soften the adhesive.

It's a much more controlled environment than using my standard heat gun.

And since we're working with small and delicate things, it is a needed piece of equipment

for this project.

I have tapped over all the holes but nine so that we can have all the suction in one

location.

I'll add another piece of tape over the cracked Apple Watch screen so air won't slip through

the cracks and cause it to lose suction...science.

And I'll also turn off the watch.

Once the machine is turned on it will start warming up the adhesive that's holding the

ribbon cables to the back of the screen.

You can kind of see them pulling up right here.

There are 3 of them all lined up in a row and this gives us some wiggle room to reach

in and unplug the cables.

The adhesive holding down the black tape over top of these connectors is incredibly gooey

and sticky and near impossible to remove gently...Thanks Tim Apple.

Normally alcohol doesn't solve problems, but in this particular case, a drop of alcohol

right on top of each of the connectors dissolves the adhesive, allowing the tape to peel back

a bit easier.

It will become sticky again after the alcohol evaporates.

Once the tape is peeled back over all 3 connectors, I can pop the little black latch up at the

top, which unlocks the corresponding cable.

The latches themselves are extremely fragile, just like everything else we've been dealing

with today.

Finally I'll grab ahold of the ribbons themselves and the top of the screen, and gently but

firmly pull the ribbons off of the screen.

It's taken me about an hour to get to this point in the process and we haven't even started

the complex part yet.

Going back to our vacuum hot plate screen separator machine.

This time around I'm going to use some high tensile strength, super thin gold colored

wire that I'll wrap around my finger to keep secure.

This wire is going to be placed directly under the glass layer of the Apple Watch screen,

but above the digitizer and screen layers.

It's a small fragile sandwich of high tech components, and if you pick the wrong layer

to slide through, the whole thing is destroyed.

I'm not being dramatic, I'm just being realistic.

You can see the wire sliding and slicing into one of the gooey layers inside the sandwich

– that's the adhesive between the glass and the digitizer, and exactly where we want

the wire to stay.

It's like trying to separate the two halves of a very expensive Oreo, but if you break

the cookie part, you lose a couple hundred bucks.

I'll lift the wire over the remaining curved glass chunks so it won't get caught on the

edge or start cutting into the sensitive bits, and then gently keep sliding the wire through

the gooey warmed up adhesive layer.

The whole thing is heated to about 80 degrees Celsius right now and that's keeping the Oreo

nice and soft for the wire to slide through.

The suction of the machine is keeping the watch screen from moving around too much while

the wire is sliding through the adhesive.

Once the wire finishes the cut and pops out the other side, the screen is loose and fully

free to pull away from that top glass layer.

The cracked glass is now removed from the display.

You can see some of the adhesive residue on the digitizer layer which is sitting on top

of the display layer, but that's pretty easy to clean off.

Nothing looks physically damaged yet so I think we're still good to continue.

The hardest part of the repair is now done...kind of.

The little bit of rubbery adhesive that is left on the screen can be gently rubbed off,

keeping in mind that this is like trying to rub flavor dust off of a Dorito, and one wrong

move can crack the whole thing.

A little bit of acetone can dissolve the rest of those lines and residue on top of the display.

But before I go any farther, I want to test and make sure my little Dorito is still in

one piece, so I'll peel back the tape over those connectors and pop each of the three

ribbons into their latches on the back of the screen.

Nudging them into place with the t-shaped bracket on the back of the ribbon.

I'll turn everything on.

The Apple Watch should still function at this point even without the glass in place.

The touch sensitive digitizer is still layered on top of the screen portion.

Yeah, it will be a tiny bit finicky because it's designed to have a glass layer on top,

but the watch should still function in general at this point.

So far, so good.

I'll turn the watch off again and remove the cables from the back of the screen.

Now it's time to add a new layer of glass to the top.

This part is pretty easy actually.

Adding the glass requires a special kind of glue.

Once the screen is totally clean from dust or fingerprints, I'll grab a little Lego to

prop the screen up.

I'll explain why in just a second.

I mostly just wanted to say 'little Lego' though.

I'll clean both sides of the replacement glass and add a dollop of Loca: Liquid Optical Clear

Adhesive.

This stuff is pretty cool actually.

It's what's going to hold the glass layer securely to the display.

The important thing when setting the glass down is that there are no air bubbles caught

under the glass.

I did catch one air bubble during my first placement, so I pulled that off and popped

it with a pair of fine tipped tweezers and then tried setting the glass down again for

the second time.

Resting the display on top of the Lego allows the display to sit up inside the curve of

the glass as it rests down into place.

But once again, I caught a little bubble under the glass as the adhesive flattened out towards

the edges.

It's not a huge deal, it just means that I have to gently persuade that little bubble

to migrate towards the edge of the glass with a tiny bit of pressure.

This little bit of pressure is also pushing out glue on the under side of the glass that

I'll have to clean up later, but as long as the Loca isn't getting on the electronics,

I'll be okay.

The cool part about this glue is that it's not going to dry on it's own, it stays liquid

and gives me plenty of time to clear the bubble and make sure the display underneath is totally

lined up underneath that glass.

The display needs to be centered evenly on every side, without any of the copper edges

showing.

I can shine a light through the underside of the display to make sure everything is

proportional, and then I can hit the whole thing with a UV or ultraviolet light.

These magical rays of artificial sunbeams are what dries or cures the liquid optical

adhesive that's holding the glass to the display.

It only takes a few seconds for the glue to start hardening and then a few more minutes

for the glass to become permanently attached to the display again.

It's pretty crazy stuff.

Thumbs up for that.

I do have to clean out the seepage from under the display from when I pressed out that little

bubble, but once that's cleaned up I can cure the underside of the glass to keep the edges

from running, and then we're pretty much done.

I'll grab the screen and pop all three of those ribbons back into their corresponding

latches and lock the fragile flaps gently down into place.

Then after making sure there's no glass slivers or old adhesive or dust resting on that Force

Touch ring, I can make sure everything still turns on.

I'm just as surprised as you are.

How's them apples.

The touch sensitivity still seems to be intact.

I'll make sure to line the antenna tab on the back of the screen up with the slot on

the motherboard and set the screen down into place to test the Force Touch.

And it looks like the Force Touch works.

For such a fragile intricate project, we definitely got lucky.

I can add some water resistant flexible adhesive to the edge of the display.