Since I couldn't find any complete guide for this, I thought I'd start one. My new digitizer hasn't arrived yet, but I already disconnected my broken digitizer.
Yes, it was hard But I think everyone with enough patience can do it.
I can't post images yet... See them here: rockenundpoppen. com/carsten/htcrepair/
1. Pull out your battery, your sim- and sd-card. You need to remove the bezel covering the flash. You can do this with a very small screwdriver at the red points, but you will probably damage your case... As seen in the video, you could push it up from the inside, if you insert something like a knitting needle through the battery housing. But I didn't try that...
2. Remove the marked screws. What you need is a size 5 torx screwdriver. Pull that little metal plate indicated by the arrow.
3. Remove the label on the right side of the phone and pull out the little cirucuit board next to the volume-keys. Now you can remove the housing by pulling upwards.
4. Remove the screws to remove the plastic piece.
5. Under the plastic piece on the left, remove the mylar and pull the connector underneath.
6. Now you can start with removing the broken digitizer... Use your hair dryer to loosen the tape underneath. Use a small screwdriver to lever it up, starting at the top. You can use a bent metal plate to try to cut through the tape. Be careful not to damage the lcd! I ended up removing the glass piece by piece at the bottom...
You can actually pull the connection cable of the digitizer now... You won't break something there.
To attach the new digitizer you need to remove the lcd as well. Use your hairdryer, and start levering from the bottom. Don't be overcautious, you need to use some force there. But: don't use your screwdriver at the left, where the little flex cable is located... I did and I broke it...
I will complete this guide later, I hope it is usefull to some of you!
Carsten
Related
Hi there,
I broke my touch screen and tried to replace it by myself.
To make a long story short, I failed miserably (I broke the screen under).
However, I learned a few things I didn't met in the forum.
A- Disassembly of the case.
1- The Legend is glued. So, you have first to use hoven to melt the glue before being able to do anything useful.
15min/ 60 degree in the oven. Or use an hair dryer (I used the former).
2- Don't forget to remove ALL the screws (even the one behind the IMEI notice).
3- Don't try to open the camera lid before loosening the glue or you'll damage the aluminium body.
4- You have to unplug all the différent cables, so take notes to remember where all of them goes.
5- You must disassemble all the boards. There are 2 boards. One supporting the sim / SD connector, and one supporting the screen/touchscreen.
6- When disassembling the screen board, remove it by pulling the touchscreen at the bottom, and lift it up. don't pass a tool on the sides to remove it or worse, under the touchscreen, you'r tool will touch the screen under and break it (like I did). The screen is very, very fragile
Now, I'm stuck here because I can't remove the connector of the legent which is passed under the shield on the back of the screen.
I'm not able to remove the screen so I would like to know how to remove this shielding or get back the touchscreen connector to be able to replace it.
Once I figure out how to remove this shiled, I may be able to remove the screen too.
But now, I'm clueless (it was 2 in the morning when I gave up).
Maybe, some of you knew the trick to open this phone further.
I'd like to hear about it.
A little up to my post for the ones who did not read it till the end:
I can't remove the connector of the legend which is goind under the shield on the back of the screen.
I would like to know how to remove this shielding or get back the touchscreen connector to be able to replace it.
Once I figure out how to remove this shield, I may be able to remove the screen too.
But now, I'm clueless (it was 2 in the morning when I gave up).
mate it sounds like you have trashed your phone.they are built NOT to be taken apart.They require special tools and process to be repaired. The only thing i would suggest is contacting your insurance company and let them know that your phone was crushed under a car or something and then crush it under the car and you can get it replaced. If you dont have insurance, take some out and make a claim in say a month or two.
Its not an honest thing to do but your phone sounds busted and its the cheapest way of replacing that handset.
Post a pic of it if you can
Unfortunately, I have no rights to post a link or some put some pics.
Something about spam and profile that should be reviewed before being able show any pics.
This device is glued. No specialized tools are able to open it without removing it.
That would mean that the phone cannot be repaired, only replaced. My phone's motherboard was replaced, so at the service stations they should have special tools.
Fixed it!
Bottom right hand corner:
Bend the shielding back just enough to allow you to slip the connector in & then use a little glue to stick it back.
Maybe I was lucky, but my phones working as good as new again
I fixed my Legend
Guys, I know it's been a while since you talked but in case someone else is looking for this info, that's what happened to me:
I cracked the display of my legend and purchased a new one on eBay (roughly 40 pounds) - obviously delivered from Hong Kong but a genuine Samsung (in case you didn't know the Legen's screen as well as most of the AMOLED screens are Samsung's).
Then I used the above information plus some YouTube videos to give myself an idea as to what should I do. The result follows:
I used a hair dryer to heat up the back of the phone (camera and loudspeaker cover). Perhaps I should have been more patient as in the end I decided to use a knife with a very thin blade to lift it and I scratched the plastic and the aluminium body a bit. Anyways - the back clicks in but is glued in addition to that so you have to use both the heat and gently applied force.
Once you remove the back cover (which took me the longest out of everything) you should start removing screws. There's two behind the back cover and six behind the bottom cover (where the battery is). At this stage you don't have to remove all the screws - the bottom two, the one behind the IMEI and the one under the VOID sticker hold the main board but the two screws sitting deeper inside the phone's body hold the front buttons so you may leave them for now.
Now comes the trickiest part so read carefully: the main board is held inside the unibody by the screws (which we already removed), but is also glued right below the camera lens and along the sides. You should probably heat it up as much as you can and for a long time. I decided to do it the hard way. My dislplay was already cracked and it's the most delicate part of the phone so I said "whatever" and used the same knife as before - moved it alongside the screen (pushed it in gently from the front) until there was no resistance (the glue let go). Then I pushed and I heated the thing up and pushed and tried from every angle until finally the board slid out of the unibody. I hope you'll find it easier then I did as it seems that everyone describing it found it quite doable.
Now everything becomes easy-peasy. Remove the remaining screws to put the buttons aside (you'll have both the actul buttons and the tiny board with sensors - the latter sticks to the screen but once you remove the connectors, yu can take it off too). All the connectors are quite easy to remove if you hav a needle or something (just pull them out gently). I didn't worry about noting which is which as ther is practically no way you can mix them up - they're very different.
The rubbery plastic black surrounding of the board clicks in, so once you find the right spots you can lift them gently and take the thing off. You'll be left with the display covered by the shielding from the top and a thin metal board from the bottom. You have to remove two more screws to disconnect the main display plug.
And the final bit (that's where the thread's author had a problem I believe). My display was cracked but the shielding - fine. These two are glued together so I had to find some space for my finger nail and lift the shield. By slowly and gently pulling it apart I detached one from the other - and had to do the same thing with the metal board. Don't forget there's some extra stuff to remove from the back of the display - they're all glued but the glue will remain fresh enough for you to glue them again - this time to the new screen. The same applies to the front shield. I hope you won't let any dust sit on it in the meantime. You should have a screen protector on your new display if you bought it like I did. Remove it now and the display will be happy to stick to the old front shield just as if it was always there. The metal back will also fit in.
Now you can go through the above process backwards - just remember to connect all the connectors.
What I didn't do: I didn't use ANY glue putting the phone back together. As an effect the front shield is sticking out a bit (doesn't sit in the unibody tightly). It doesn't affect the phone itself but it gives you the funny feeling that something isn't 100% right. But I prefer that than screwing something up with a misuse of glue (glue can be disobedient).
The most important piece of information: the phone is working 100% correctly as if it was never disassembled by an amateur. Apart from two scatches on the back, the VOID sticker missing, the front sticking out slightly (less than a mm) and the missing battery slider (which I forgot to put back in and didn't bother to repeat the whole process for the sake of it) - there is nothing wrong with the phone. So if you ever crack you ever crack your Legend's screen - you can try fixing it yourself if you have the courage.
I would like to see some photos too But I'm never gonna take my phone apart - can't see the point
Foto's
Nice thread, i myself am wondering, if a better gsm antenna can be fixed inside the phone. and connect them to the 2 connections.
Do you have any pictures of the inside housing etc?
I am doing a complete replacement of the housing of my Google G1.
I have run into a problem in which there are some brass nuts inserts embedded in the plate and I would need to get them out so I can then replace them in the new plate.
I was thinking if heating the vicinity with a blow dryer around the nuts might expand the plastic making it easier to wiggle the brass inserts out. Another idea (which I do not like very much but am keeping it as a last resort) is to cut some thin lines with a utility knife along the length of the insert plastic housing and see it would loosen the inserts.
Do any of the above ideas hold merit?
Anyone have any idea on how to get them out without damaging the original plate?
As I am a newbie at this forum, I am not allowed to post any pics till I have at least 8 postings. If anyone can help me post them, I can send you the link.
Thanks
Those are not removable.
If the original is not already destroyed, there is no reason to be replacing it, so don't bother.
dhkr123 said:
Those are not removable.
If the original is not already destroyed, there is no reason to be replacing it, so don't bother.
Click to expand...
Click to collapse
Thanks for the advice but as I had already disassembled the whole phone, I decided to continue and hoped nothing breaks.
I finally did get the inserts out from the original plate and assembled them in the new plate. What I did was to heat up a soldering iron and use it to heat the brass insert. Before doing this I plugged the insert with its screw to make it easier in pulling the insert out.
Using the iron, heat up the insert while have someone else like your friend hold the screw via pliers. Make sure that the iron only touches the head of the screw and not the plastic . As the insert gets heated up, the plastic also heats up and expands a bit. By wiggling the screw and pulling it with the pliers the insert will come out relatively easily.
Same methodology should be applied when installing the insert in the new plate except no screw is needed. Hold the insert (without the screw) over the hole. Place the tip of the heated soldering iron on the insert and slowly press the insert. Due to heat, the plastic will deform a bit to allow the insert to make way into the hole. DO NOT keep the soldering iron on the insert for the whole duration else you may find that the insert has gone right through the plate rendering it useless. Ensure that the insert is flush with the height of the hole and that it is not protruding in anyway. If it is, the use the iron to push it back till it is flush.
Make sure that you let it cool for 10-15 min before continuing with the installation of the new housing..
Before I forget, a big thanks goes out to go.speedracer for guiding me in the right direction.
I have looked high and low for Legend disassembly instructions in order to replace my screen (Digitizer) I finally found instructions on how to disassemble the HTC Legend and replace the screen thanks to allerien's post in the XDA forums 11th March 2011, 07:17 PM. There are no YouTube videos yet that I know of that actually show u how to remove and replace the screen so this is a step by step guide tat will help alot of user's including me.
Thanks Allerien
--------------------------------------------------------------------------------
I fixed my Legend
I cracked the display of my legend and purchased a new one on eBay (roughly 40 pounds) - obviously delivered from Hong Kong but a genuine Samsung (in case you didn't know the Legen's screen as well as most of the AMOLED screens are Samsung's).
Then I used the above information plus some YouTube videos to give myself an idea as to what should I do. The result follows:
I used a hair dryer to heat up the back of the phone (camera and loudspeaker cover). Perhaps I should have been more patient as in the end I decided to use a knife with a very thin blade to lift it and I scratched the plastic and the aluminium body a bit. Anyways - the back clicks in but is glued in addition to that so you have to use both the heat and gently applied force.
Once you remove the back cover (which took me the longest out of everything) you should start removing screws. There's two behind the back cover and six behind the bottom cover (where the battery is). At this stage you don't have to remove all the screws - the bottom two, the one behind the IMEI and the one under the VOID sticker hold the main board but the two screws sitting deeper inside the phone's body hold the front buttons so you may leave them for now.
Now comes the trickiest part so read carefully: the main board is held inside the unibody by the screws (which we already removed), but is also glued right below the camera lens and along the sides. You should probably heat it up as much as you can and for a long time. I decided to do it the hard way. My dislplay was already cracked and it's the most delicate part of the phone so I said "whatever" and used the same knife as before - moved it alongside the screen (pushed it in gently from the front) until there was no resistance (the glue let go). Then I pushed and I heated the thing up and pushed and tried from every angle until finally the board slid out of the unibody. I hope you'll find it easier then I did as it seems that everyone describing it found it quite doable.
Now everything becomes easy-peasy. Remove the remaining screws to put the buttons aside (you'll have both the actul buttons and the tiny board with sensors - the latter sticks to the screen but once you remove the connectors, yu can take it off too). All the connectors are quite easy to remove if you hav a needle or something (just pull them out gently). I didn't worry about noting which is which as ther is practically no way you can mix them up - they're very different.
The rubbery plastic black surrounding of the board clicks in, so once you find the right spots you can lift them gently and take the thing off. You'll be left with the display covered by the shielding from the top and a thin metal board from the bottom. You have to remove two more screws to disconnect the main display plug.
And the final bit (that's where the thread's author had a problem I believe). My display was cracked but the shielding - fine. These two are glued together so I had to find some space for my finger nail and lift the shield. By slowly and gently pulling it apart I detached one from the other - and had to do the same thing with the metal board. Don't forget there's some extra stuff to remove from the back of the display - they're all glued but the glue will remain fresh enough for you to glue them again - this time to the new screen. The same applies to the front shield. I hope you won't let any dust sit on it in the meantime. You should have a screen protector on your new display if you bought it like I did. Remove it now and the display will be happy to stick to the old front shield just as if it was always there. The metal back will also fit in.
Now you can go through the above process backwards - just remember to connect all the connectors.
What I didn't do: I didn't use ANY glue putting the phone back together. As an effect the front shield is sticking out a bit (doesn't sit in the unibody tightly). It doesn't affect the phone itself but it gives you the funny feeling that something isn't 100% right. But I prefer that than screwing something up with a misuse of glue (glue can be disobedient).
The most important piece of information: the phone is working 100% correctly as if it was never disassembled by an amateur. Apart from two scatches on the back, the VOID sticker missing, the front sticking out slightly (less than a mm) and the missing battery slider (which I forgot to put back in and didn't bother to repeat the whole process for the sake of it) - there is nothing wrong with the phone. So if you ever crack you ever crack your Legend's screen - you can try fixing it yourself if you have the courage.
Isn't it possible to just exchange the glass along with with the digitizer? I myself need to replace the digitizer, because mine went quite unusable after an accident with water..
Either way this was a nice guide which i will make use of!
great info my legend has only a broken digitizer so i will be replacing that soon
Is there any way to get to the buttons on the front without having to remove the main board? I just broke my cable to the buttons and I am planning on replacing it soon.
EDIT: Is there any app that will let me remap the key that is used to wake up my phone? I want to be able to use the phone while I wait for the flex cable to show up. I can turn my phone on by plugging it in because it is on MAGLDR.
No, you will have to completely disassemble the phone, including the lcd/digitizer assembly from the middle chassis to access the buttons flex.
Maybe a stupid question that also refers to this but I got conned by a guy whom I bought a HD2 from. Also the cable to the buttons is broken, as so many other things.
Does your touchscreen still react when that cable is not attached?
Yeah the touchscreen still reacts without the buttons flex cable attached, done it myself a bunch of times, so 100% confirmed
huggs said:
Yeah the touchscreen still reacts without the buttons flex cable attached, done it myself a bunch of times, so 100% confirmed
Click to expand...
Click to collapse
Ok thx for confirmation. This guy conned me with a 'perfect hd2' broken camera glass, broken flex cables all around, a broken digitizer, .... well nothing worth then
e334 said:
No, you will have to completely disassemble the phone, including the lcd/digitizer assembly from the middle chassis to access the buttons flex.
Click to expand...
Click to collapse
Darn it. Do I also have to remove the main board from the chassis too or is there any way to remove the screen and digitizer assembly from the chassis without removing the main board?
You do not have to remove the entire LCD/digitizer assembly, you just need to pry enough space between the bottom of the digitizer and the plastic frame to remove/replace the buttons. I've done it to three phones. It may be easier in the end to remove the entire thing, because it can be difficult to get the part that you pry up to adhere back together though. This phone is a major pain in the ass to work on beyond the motherboard area.
brandogg said:
You do not have to remove the entire LCD/digitizer assembly, you just need to pry enough space between the bottom of the digitizer and the plastic frame to remove/replace the buttons. I've done it to three phones.
Click to expand...
Click to collapse
Hmm. Would heating it up a little bit make it easier to pry apart then? I tried it a bit after I realized that I broke the cable, but my device seemed to be really stiff.
And if I do remove the screen, would I need anything special to put the display back on?
Yes, you have to heat it up or you will probably destroy the phone. The best thing you can do is get it very hot (not hot enough to melt the plastic button strip) and try to get the adhesive to stay completely on the frame, then reheat it again right before you put it back together. I repair phones (and game consoles) for a living, and heating the adhesive (right) before assembly is the best piece of advice I can give anyone on just about any phone. Most of the time you don't even have to replace the adhesive if you do it this way.
brandogg said:
Yes, you have to heat it up or you will probably destroy the phone. The best thing you can do is get it very hot (not hot enough to melt the plastic button strip) and try to get the adhesive to stay completely on the frame, then reheat it again right before you put it back together. I repair phones (and game consoles) for a living, and heating the adhesive (right) before assembly is the best piece of advice I can give anyone on just about any phone. Most of the time you don't even have to replace the adhesive if you do it this way.
Click to expand...
Click to collapse
Alrighty. Thanks for your help!
This is the HTC Evo 4G take apart repair guide. Following this written repair guide will help you take apart your Evo 4G fairly easily in a step by step manner giving you a chance to replace faulty parts.
This guide will help you to install the following HTC EVO 4G part(s):
HTC EVO 4G LCD Screen Replacement Display
HTC EVO 4G Glass Touch Screen Digitizer
Tools Required:
Safe Open Pry Tool
Small Phillips Screwdriver
T5 Torx Screwdriver
Pair of Tweezers (optional)
Hot Air Gun / Hair Dryer (optional)
HTC EVO 4G Take apart repair guide:
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Figure 1
First of all remove the back cover (battery cover) of the phone using a safe open pry tool. Carefully insert the pry tool between the edge at the back of the phone as indicated by the arrows in figure 1 and pry the cover off. The battery cover should come off quite easily.
Figure 2
Remove the battery and the SD card from the phone as well. To remove the SD card you will need to pop the tab first at the location shown in figure 2 and then take out the SD card. You may use a pair of tweezers if you find it difficult to remove the memory card with your hand.
Now in order to remove the back-frame of the phone you will need to unscrew six Torx screws. Using a T5 Torx screwdriver, remove these six screws from the locations shown in the figure 2.
Figure 3
Once you have removed the screws you can carefully pry the back-frame off using safe open pry tool. Insert safe open pry tool between the edge that separates the frame and the body of the phone and run it along the sides to unclip the clips. The removed back-frame will look similar to the figure 3.
Figure 4
The next step is to remove the mainboard (logic board) from the unit. In order to remove the mainboard you will have to unscrew a Phillips screw first and then detach three ribbon cable connectors.
Remove the screw first using a small Phillips screwdriver from the location shown in the figure 4 by a small circle 1.
Disconnect the three ribbon cable connectors using safe open pry tool at the locations A, B and C in the figure 4.
Figure 5
The mainboard will now be released and you can take it off from the phone assembly and put it aside.
Lift out the camera from its location indicated by orange arrow in figure 5 and then carefully pry up the ribbon cable which will be glued at the back of LCD indicated by gray arrow in figure 5. Note that you need to lift up this cable from its colored end (which you have disconnected from the mainboard) and then pry it off from the back of LCD. Do not pull it off completely from the unit because it is a part of glass screen (touch screen digitizer).
Using a safe open pry tool, carefully pry up the front glass screen from the unit. Note that the glass screen will be adhered to the unit all along the sides with an adhesive material and you may have to use a hot air gun / hair-dryer before prying up the front glass screen.
After you have the glass screen digitizer completely pried off, gently lift it up from the unit because you will have to run the ribbon cable through the gap to completely separate it from the assembly.
The HTC EVO 4G is now disassembled and you can replace the damaged part(s) with new ones. Reverse the instructions above to reassemble your phone.
Good stuff bro! thanks! I am sure this will help many! its a great guide i just hope I never need to use it
stevovanburen said:
Good stuff bro! thanks! I am sure this will help many! its a great guide i just hope I never need to use it
Click to expand...
Click to collapse
Thanks for the support. Glad you found it useful!
i would like to add a couple notes after doing this myself.
1. the volume and power buttons come off real easy and are easily lost. do this work on a table and keep track of those buttons they really do just fall off.
2. sometimes the parts dont come with adhesive to glue sthe glass down and to keep dirt and stuff out. i used silicone for this.
3. the glass has 3 prongs attached to them, these also dont always come with the replacement part but come off the old one easy enough just try and keep some of the sticky stuff on them to "glue" them to new glass
4. use white gloves or latex gloves the new glass attracts dirt/fingerprints real easy and you dont wanna keep wiping it down
grrmisfit said:
i would like to add a couple notes after doing this myself.
1. the volume and power buttons come off real easy and are easily lost. do this work on a table and keep track of those buttons they really do just fall off.
2. sometimes the parts dont come with adhesive to glue sthe glass down and to keep dirt and stuff out. i used silicone for this.
3. the glass has 3 prongs attached to them, these also dont always come with the replacement part but come off the old one easy enough just try and keep some of the sticky stuff on them to "glue" them to new glass
4. use white gloves or latex gloves the new glass attracts dirt/fingerprints real easy and you dont wanna keep wiping it down
Click to expand...
Click to collapse
Some nice tips, however....
Be VERY careful when using glue to attach the screen, not only can this damage the digitizer itself but it not the correct thickness to create the correct spacing between the glass and the LCD screen. Always use adhesive strips, NOT glue.
I'm having a problem after replacing my digitizer for the evo 4g. It boots and audio works fine, but the screen is completely white (no logo). I checked the ribbon cable for the LCD but it looks fine and is definitely connected all the way. Are there any other possibilities here?
Here are a couple of things you can try: make sure correct part was ordered, and check that all flex cables are securely locked in place.
Thanks this is going to help, now if I can figure out what screen to order with out having to take apart the phone...
repairsuniverse said:
Some nice tips, however....
Be VERY careful when using glue to attach the screen, not only can this damage the digitizer itself but it not the correct thickness to create the correct spacing between the glass and the LCD screen. Always use adhesive strips, NOT glue.
Click to expand...
Click to collapse
I found that out the hard way lol... I used some bonding glue that was all bad, not to mention the spacing was off by a few hairs... But I'm still trying to find the right adhesive strips..
kevo3000 said:
I found that out the hard way lol... I used some bonding glue that was all bad, not to mention the spacing was off by a few hairs... But I'm still trying to find the right adhesive strips..
Click to expand...
Click to collapse
Yes. ALWAYS use adhesive strips. NOT glue. Glue can not only damage the digitizer, but even if it doesn't you will not get the correct thickness between the LCD and glass.
You can find the right thickness adhesive strips here - Adhesive strips for touch screens
Whatever you do, make sure you dont accidentally scrape the LCD screen, super tiny nick resulted in this:
https://dl.dropbox.com/u/10726414/IMAG0534.jpg
Hey guys
I'm having this issue where the LCD I ordered doesn't fit correctly inside the seat, making it so the glass wont snap in. I can get the top part in, but then the bottom is too high up. I've tried using force, but I know that is a really bad idea. Any ideas? I've got a feeling they sent me an incompatible screen. Although, I did boot the phone while it was connected, and confirmed it to be working just fine.
The HTC EVO 4G has multiple screens. Make sure you ordered the correct screen for this device.
stinky634 said:
Whatever you do, make sure you dont accidentally scrape the LCD screen, super tiny nick resulted in this:
https://dl.dropbox.com/u/10726414/IMAG0534.jpg
Click to expand...
Click to collapse
Yep had that happen twice, I also noticed that black LCD film is like those expensive camera lens's where when you touch them, fingerprints, smudges, lint, dust, then they are no good any more!
Be sure to check out our Evo 4G video repair guide which can be used in correlation with this written repair guide.
htc evo 4g
hey
i used this guide to swap a cracked digitizer on a htc evo 4g , everything went well but when i rebooted the phone the screen is slugish to unresponsive its very difficult to get it to unlock and the calibration on the keyboard tool did nothing to help fix it
ive ordered a second digitizer to try swapping that but its not in yet ,
any thoughts ?/
Great Guide . Thank you.
TEAM MiK
MikROMs Since 3/13/11
Is there another way of determining the LCD type on the HTC Evo 4G without disassembling my phone?
very good. thanks.
repairsuniverse said:
This is the HTC Evo 4G take apart repair guide. Following this written repair guide will help you take apart your Evo 4G fairly easily in a step by step manner giving you a chance to replace faulty parts.
This guide will help you to install the following HTC EVO 4G part(s):
HTC EVO 4G LCD Screen Replacement Display
HTC EVO 4G Glass Touch Screen Digitizer
Tools Required:
Safe Open Pry Tool
Small Phillips Screwdriver
T5 Torx Screwdriver
Pair of Tweezers (optional)
Hot Air Gun / Hair Dryer (optional)
HTC EVO 4G Take apart repair guide:
Figure 1
First of all remove the back cover (battery cover) of the phone using a safe open pry tool. Carefully insert the pry tool between the edge at the back of the phone as indicated by the arrows in figure 1 and pry the cover off. The battery cover should come off quite easily.
Figure 2
Remove the battery and the SD card from the phone as well. To remove the SD card you will need to pop the tab first at the location shown in figure 2 and then take out the SD card. You may use a pair of tweezers if you find it difficult to remove the memory card with your hand.
Now in order to remove the back-frame of the phone you will need to unscrew six Torx screws. Using a T5 Torx screwdriver, remove these six screws from the locations shown in the figure 2.
Figure 3
Once you have removed the screws you can carefully pry the back-frame off using safe open pry tool. Insert safe open pry tool between the edge that separates the frame and the body of the phone and run it along the sides to unclip the clips. The removed back-frame will look similar to the figure 3.
Figure 4
The next step is to remove the mainboard (logic board) from the unit. In order to remove the mainboard you will have to unscrew a Phillips screw first and then detach three ribbon cable connectors.
Remove the screw first using a small Phillips screwdriver from the location shown in the figure 4 by a small circle 1.
Disconnect the three ribbon cable connectors using safe open pry tool at the locations A, B and C in the figure 4.
Figure 5
The mainboard will now be released and you can take it off from the phone assembly and put it aside.
Lift out the camera from its location indicated by orange arrow in figure 5 and then carefully pry up the ribbon cable which will be glued at the back of LCD indicated by gray arrow in figure 5. Note that you need to lift up this cable from its colored end (which you have disconnected from the mainboard) and then pry it off from the back of LCD. Do not pull it off completely from the unit because it is a part of glass screen (touch screen digitizer).
Using a safe open pry tool, carefully pry up the front glass screen from the unit. Note that the glass screen will be adhered to the unit all along the sides with an adhesive material and you may have to use a hot air gun / hair-dryer before prying up the front glass screen.
After you have the glass screen digitizer completely pried off, gently lift it up from the unit because you will have to run the ribbon cable through the gap to completely separate it from the assembly.
The HTC EVO 4G is now disassembled and you can replace the damaged part(s) with new ones. Reverse the instructions above to reassemble your phone.
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You're welcome!