HTC Touch Diamond LCD and Digitizer replacement Guide (HOW TO)

Before you proceed, please note that I cannot be accountable/liable for any damage caused to your phone. This is only a guide! 

I will mention that I am only going through the steps once you have disassembled the phone according to the various guides available on the Internet.Namely, the official HTC service manual or this Russian site here:http://www.pdacenter.ru/razborka/razbor-htc-touch-diamond/

There are plenty of guides on the net on how to disassemble the HTC Diamond, but little about replacing the LCD/Digitizer (hence my write up here!). 

I apologise that I have not taken pictures at every stage of this process, but I will attempt to explain everything in as much detail as possible. Some pictures I have managed to take are a little blurry, but hopefully you get the drift. 

Getting Started

Once you have managed to dismantle the phone to this point, please follow on with this article. At this point, the screen is still glued to the chassis (very tightly!).

1. Dismantle to basic chassis

To proceed, you will need to pry off the screen. People have recommended using credit cards, which will do the trick nicely once you have managed to find an opening to leverage from. Hopefully, if you have bought your replacement tool they have given you some sort of plastic tool to lever with. The tool on the left works best.

Tools needed

At this point, you will pretty much have to use the lever and a credit card to pry the glue loose. If done successfully, you will have something that looks like this.

Seperated parts

Now at this point, you could try and separate the LCD from the digitizer if you only bought one or the other. I suggest that you replace both the LCD and digitizer as there is a high chance that you will not be able to separate them without breaking one or the other. This is just my opinion but there have been people who have successfully done this. If you manage to separate them both, you’ll need to desolder the connection between the LCD and digitizer (4 contact points on a ribbon cable – can be seen on the left in the image below).

The image below shows the silver foil and plastic insulation removed from the rear of the LCD/digitizer unit. Remember the order in which you peeled off the insulating tape and the silver foil! I will explain the problem I had a little later.

Back of LCD

For me, I bought a new LCD and digitizer separately, so I had to solder the 4 contacts on the left myself (notice the arrow). This wasn’t too hard to do if you have ever soldered stuff before. Just make sure there is no shorts between the contacts. To avoid this work, you should buy the LCD/digitizer preassembled as one unit.Once you have put together the LCD and digitizer, you will need to remove any of the scratch protective plastic layers off them. Put them together as they’re suppose to be and then stick them back into the chassis. You will need some sort of glue to make the digitizer stick to the chassis. When I pulled mine apart, a lot of the glue stayed on the chassis so I simply popped the digitizer back in and pressed firmly to make it stick. This is not recommended though, as a drop of the phone will cause the digitizer to fall out!Assuming you have figured out some way to make the digitizer stick to the chassis, you’ll notice that the LCD screen also needs to be stuck to the digitizer in some manner. The way I achieved this was to tape the LCD to the chassis with thin strips of electric tape. This stopped the LCD from moving around. 

Putting it all back together

You will need make all the ribbon stick to the back of the LCD for tidyness (as above). To do so, I peeled off the double-sided tape from my faulty unit and re-used it.

When putting the silver shielding tape back on, please remember that it is conductive and can cause shorts. I spent ages wondering why my digitizer wouldn’t work and finally realised I forgot to put the yellow insulating tape back on before I put the silver shielding tape back over the ribbon with the 4 contacts that I had to solder (see picture below)!

Start assembling

When you are putting it back together, there is a point where there are 2 sets of ribbon cable that need to make contact with a floating circuit board that sits on top. These two contacts need to be secured properly, and the best way to do it is to view it from side on and use a thin flat head screw driver to firmly press in those contacts. The image below shows the side on view I’m talking about.

Assembly side on view

The two parts I am referring to are these:

The two parts

When putting it back together, follow the service manuals or just remember what you pulled apart.

I suggest that before you put everything back together entirely, that you slip the battery in and give it a quick test at this point.

Quick test at this point

With any luck, the phone turns on, the LCD screen lights up, and the digitizer works! I hope this article helps some people out there who are wondering how to change that screen.

All done!

33 thoughts on “HTC Touch Diamond LCD and Digitizer replacement Guide (HOW TO)

  1. Hi. Sorry for the late reply. If the digitizer doesn’t work, it will definitely be something with those solder points shorting against something. You’ve checked the insulating tape, and the only other thing I can suggest is to make sure the solder points don’t make contact against any metal surface.

  2. Pleaseee…I need your help how did you solder the digitizer connector and LCD I tried gluing them together?..the other thing I dont know is (reffering to picture 4 from top) what do you do with the “ribbon connectors” (picture 4 from top) do you glue them to the chassing or you need to put insulating tape and then glue them to the chassing?…Please if you could explain me the process in picture 4 all i need to know about where to put the insulation and how to connect the digitizer and lcd and what to do with the ribbon connectors glue them with or without insulation? where does the insulation go on top or below the ribbon conectors….
    Pleaseee…
    Thank you

  3. To solder the connections together, you’ll need to shoot down to your local electronics shop and purchase a soldering iron and some solder. Maybe try soldering some wire together or something as a test to get the feel for it.

    With the insualating tape in picture 4, it is used to prevent any of the ciruitry from touching the back of the LCD (fully made of metal) and creating shorts. It doesn’t matter how you get the ribbon cable to stay, so long as there is insulating tape (yellow) in between to prevent it from shorting.

    Hope this helps!

  4. Excellent work
    It´s what I was looking to take the risk of changing only the digitizer
    I will try this next week, and then I will send comments.
    Thanks.

  5. This is great and what I am looking for. There are a few videos around but not about replacement of LCD/Digitizer. I ordered a LCD and a digitizer from ebay but not preassembled. I think I can manage to solder them! After my parcel arrives I will post the result ASAP. Thank you for your great work and sharing it…

  6. This is great. Thanks alot. I have found 4 x you tube videos on dissasembling the device but nothing on replacing the digitizer. I have just bought the digitizer on ebay, and when it arrives i will give it a go. I am an electronics tech with soldering experience , so it should go ok. will keep you posted

  7. Hi, I just ordered a set of touch screen and LCD screen on eBay. The product picture shows them as separate units, so I think they’re not preassembled.
    Can you please explain how both units are fixed to the housing? The touchscreen has to be glued to the front side of the metal housing frame, right? But how’s the LCD fixed in the housing? Can you explain in more detail the way you used the electric tape? And do both units have to be glued together? Do they come with adhesive surface?
    TIA
    Joe

  8. Hi Joe. Thanks for your post. The digitizer is light glued to the LCD at best. The LCD is glued to the chassis. I did not replace this glue, as when disassembling the unit some glue residue was left on the chassis. Enough to hold the LCD in place.

    With the electric tape, it’s to prevent the LCD and digitizer from making direct contact with each other. The back of the LCD is pure metal, so if the digitizer was to just “rest” on this, it would create a short.

    Hope this helps, and feel free to repost.

  9. Hi Philip. this is a great post with some pretty crucial and detailed information in it too. My question is a little off topic but on the digitizer subject: I’d like to know if the digitizer is made out of a single piece, or if it’s actually covered with any protective plastic foil (as i’ve heard some touchscreens would have). More clearly put: i bought my diamond from someone and it came with some nasty scratches on the screen. Can that part be replaced or would that involve changing the digitizer itself? (some people told me that the top layer is just atached to the digitizer and could pe replaced). Looking forward to your reply.. Thanks a lot.
    Ovi

  10. Hi Ovi. I know exactly what you mean. The screen on the phone itself is the digitizer. The actual LCD screen sits under the transparent digitizer. The digitizer and the LCD are seperate parts (as you can see from the post).

    However, if it’s the phone is still stock from HTC, then the digitizer and the LCD are glued together. You can try and seperate them, but I had no such luck. You’ll probably have to buy both units to replace it.

    It sucks, but its like when I cracked my screen. You tend to crack only the digitizer. You’ve cracked the LCD when you see the screen bleed.

    Speak soon.

  11. Thanks a lot for the answer Pillip, i needed to be sure.. for now i’ll stick with the actual digitizer cause the scrathes are still bearable. if i’ll find a good offer on a lcd+digitizer i might do it.. one more thing: the oficial service manual from HTC sais that the navigation and WiFI coaxial cable needs to be replaced after dissasembly, is that really necesary or can we stick to the initial one with no problem? Thanks , have a nice day

  12. Hi Ovi. I think they tell you to replace it because the contacts for where the cables join into the PCB are quite flimsy. When I went to reconnect that coaxial cable, I just made sure it was tight and secure. So to answer your question, no I didn’t replace the cable at all.

    Hope it all works out for you!

  13. Hello,
    I’ve replaced the LCD, digitizer and keyboard on my Diamond but I have a little problem: Everything works except the microphone. I don’t know what I did wrong… Now I can use the phone only if I connect the handsfree. If you have any suggestions pls help!!!

    Thank you!

  14. Hi,
    Thanks for a great write up.
    I have a Telus HTC Diamond that needs the digitizer changed.
    Has anyone been successfull in using a Sprint digitizer on a Telus Phone?

    Thanks.

  15. Pls help me, I bought a LCD and digitizer on Eby, soldered correctly (or at least it looks like this) and repacked all. Now phone turns on but no LCD lighting up. I tried also to connect usb cable but seems it’s not charging anymore. Any idea on what I did wrong??

    Thank you very much in advance
    Marco

  16. Hi Joe. I have no specific experience with the Telus or Sprint HTC Diamond’s. However, OEM phones in general use all the same parts. The difference is in the OS/ROM.

    Marco, please check that the floating circuit board is making contact. It may be charging, but you just can’t tell because your charging light might not be working etc.

    Feel free to post with an update.
    Thanks

  17. Hi Philip, thank for answering. I checked and seems like the ribbon cables ok, the floating board connecting to the lcd is making contact, and before I replace the lcd the light was working. The strangest part is that lcd seems died, I tried to connect only it to the board but still no lighting on. The vendor assured me they tested the lcd and was working, so I’m a bit lack of ideas now. I reassembled the phone at least 5 times but same result. I would ask if it’s possible that you check the phone if I send it to you and solve this problem? Is it possible?

    Thank you in advance

  18. Hi Marco. It’s unfortunate that you have not been able to get it working. I will not be able to check the phone for you, as I cannot accept responsibility for it being lost in transit or damage that I may cause if I was to attempt it!

    Have you tried reusing the old LCD/digitizer set and seeing if that works?

  19. Hi Philip, the old LCD was already broken so I cannot check it. Anyway I can send you some photos to explain better how I’m doing it all. My email is ilzazza (at) libero dot it

    Pls stay in touch there cos right now I do not have a functioning phone, so no damages could be bad than this. Hope u can suggest me new ideas

    Waiting for your reply

  20. Hi Philip I will wait your email to answer back with some pics.

    ilzazza (at) libero (dot) it

    Thank you very much in advance

  21. Hi Philip, still no emails from you. Anyway I would ask if the soldering between LCD and digitizer could be the reasons for not working or if it could be simply LCD defecting. The only solution should be to buy a pre-assembled LCD + digitizer to solve the problem?

    Thank you

  22. Sorry, have been trying to send emails to you but it has failed.

    It would be a good idea to try and buy the LCD and digitizer as a combo. You have a strange problem, and it appears that everything is correct. Whether you pursue this further or not, I think it would involve getting your hands on another LCD and digitizer (preferabbly assembled).

  23. Hi did you tried to the email address ilzazza@@libero.it ? (pls keep just one @ due to alot of spam problems)
    I’ll try to buy another assembled LCD but I would send you some pics the same. Gimme your email so I can directly send them to you

    Thanks

  24. Hi, I just replaced the digitiser and found out that the lcd is faulty t00. When i replaced the digitiser it was working perfectly cause i could feel the vibration when i touched the screen. I ordered an lcd and replace it but this time the digitiser is dead. I soldered and resoldered the digitiser several times and still the same. Could it be that the digitiseris shorted. Also one thing i noticed is that i have no sound while the volume is set at maximum. Can’t understand why. Your help will be greatly appreciated.

  25. Hi, great walkthrough..i have a problem though..After i re-assembled the htc diamond the screen fires up but the touch doesn’t work.. i have image and i can navigate with the buttons but no touchscreen..Do you have any aidea what’s possibly wrong??

  26. dear Phillip
    Just a biiiig thank you for this tutorial! everything was as explained! there are no sources in net for how to put the digitizer correctly, and all of your comments about the sorts that caused if the four contacts were not protected was right. i put electric tape to protect the four contects of the digitizer and my phone boots perfectly.
    thanks again and sorry for my bad english!

  27. Hi Chris. Sorry for the delay in getting back to you!
    I think your problem is because the silver shielding tape is not insulated with the yellow insualting tape? Are you able to check this?

  28. I purchased the HTC Touch Diamond Digitizer P3700 from ebay.com and took the same for repair shop. they tried but the right side of the display shows a BLUE VERTICAL LINE and also the right bottom of the touch has become too much sensitive, like if i touch it then the whole display changes colors. before repairing the display was fully working and clear…. Kindly help out, what could be the probable issue with my phone regarding
    1) Blue vertical line on right side of the display and
    2) Right Bottom Corner of touch screen becoming highly sensitive.

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