Busted screen replaced, still not working - Tilt, TyTN II, MDA Vario III General

My dumb butt child was sucking on my phone a couple weeks ago and caused the LCD to short out or something. The phone still worked and if I used a bright light I could shine it onto the screen and barely make out what was on the screen. It was booting properly and I assume that if I could make out the menu options the phone would still function. I assumed that she shorted out the LCD so I ordered, received and replaced the LCD tonight. Apparently this was not the problem, sucks to be me. I do think there was a problem with the touch screen portion already which is now working properly again but still I can still not see the screen for crap. It's like the brightness setting is on 1 or something. If I use a flashlight I can make out the screen, use the stylus and operate the phone. When I was replacing the LCD I noticed that the two circuit boards to the north and south of the LCD seemed to have a bit of corrosion on some of the tiny chips. I used an alcohol swab to clean the area off but that didn't make a difference. I am utterly convinced that the motherboard is fine since it seems to be well protected in the case and not easily accessible to moisture. I see no signs of corrosion on the motherboard like I do the two circuit boards around the LCD area. I noticed that there are only two contacts on the LCD one of which is a cable that plugs into the south circuit board just underneath the front panel key pad. Just to the right of that cable connection is where I saw signs of corrosion so I wonder if that board is the problem.
The computer tech in me says that I could be swapping parts all night before I get this right. Since the LCD plugs into that board, that could be the problem, there is a ribbon cable that wraps around the back of the LCD which also seems to make contact with the LCD which could also be the problem, that ribbon cable plugs into the north circuit board, so that might be a problem and finally, the ribbon cable plugs into the main board so that too might end up being a problem.
Can anyone take a guess as to why I might be seeing such low contrast/brightness from the LCD? I have already adjusted the brightness setting in the menus. I think it was called the backlight setting, but I moved them to the far right with no change. Again, this is a near pitch black screen that is only visible when I shine a light onto the screen.

i haven't taken my tilt apart but as a computer tech repairing broken laptops etc i know your problem.
as for laptops, there is a little inverter card that powers the backlight. its connected to the display unit by 2 cables (same as with my digital camera, rip ) and this boards are really weak / vulnerable to moisture...
so most likely this board is damaged...

That sort of explains what I think is going on too. Take a look at this cable (apparently it's clickable and will grow slightly in size to give more detail):
Let me explain the cable. This fits directly behind the LCD. The LCD comes with one flat ribbon cable and it plugs into a port on the right side of this picture. On that right circuit board if you notice the top left portion of the board there is thin black slot which is where the LCD plugs into if I recall correctly. There is another cable that plugs in just to the right of that jack from where I forget actually, lol. Once that cable is flipped over the bottom keypad on the phone sits right on top of that board. In fact on the other side you can even see the contacts for the outside buttons. The buttons in question would be like the green phone and red phone, the "e" shortcut and pretty much all the silver external shortcut buttons. Getting back to the cable, you will notice that in the middle of the cable there is a rather wide connection and that is the one that plugs onto the motherboard.
When I was replacing the LCD I spotted two sources of corrosion on both boards. The more plausible culprit was about 1/8 of an inch away from where the LCD plugs into the right circuit board.
I sent HTC an email seeing if they would help to which they told me to send it in. I have no intentions of doing that. I already know how to disassemble and reassemble the phone at this point and I already have 35 dollars invested into a new LCD. I am not about to spend 250 bucks to have HTC take 3 weeks to replace that cable. After some searching last night though, I have no idea where to get the cable. It seems that all the normal parts places on the web want 90 bucks for this cable, but at the same time they want 120 for the LCD. Obviously prices have dropped some because I was able to get the LCD new from ebay for 35. I just need help finding a place that will sell me that cable at a reasonable price.
Now that you have looked at the cable and that board, do you think it's possible that the right board could be the back light inverter that you were mentioning? If that's truly the correct board then it would make since that there is something wrong with it since I saw signs of possible damage and the LCD does work, just not strong enough to be seen with the naked eye. Since these things tend to work much like laptops do, I am leaning towards the possibility that you totally know what your talking about and that it would make since that this is the faulty part.
One other thought, the backlight is the piece that increases the brightness of the LCD right and not just some sort of overhead flashlight or something, correct? The term backlight almost implies a different part but I am pretty sure it's the term used to describe the brightness of the LCD in this case. I just wanted to make sure we were on the same page here.
Any additional thoughts?
Thanks

okay, to be clear about this. i am not 100% sure, if the backlight on the kaiser works the same way as the one on my IBM Thinkpad T41.
tl;dr; i don't know if the kaiser actually has an inverter board.
as for the cable: if you found a bit corrosion on both boards, i'm pretty sure that the reason why your backlight doesn't work.
about the last part: yeah, with "backlight" i mean the unit sits behind digitizer and LCD and increases the brightness of the lcd so you are able to read everything on the screen. i don't mean an overhead flashlight
btw, i just found this one
http://www.cellulardr.com/50H10051-41M-XC.htm
selling the cable / boards or about 90$
<edit>
disregard that... i noticed that the boards allways come with that cable assembly.... and cost about 90$ everywhere... will keep an eye on that.
</edit>

I'm going through the same thing. Did you ever replace that piece? Please let me know because it sucks to not use this phone.

Related

Can a broken screen be fixed?

HELP! A few days ago I sat on my PDA as it sat in my pocket and cracked the screen beyond repair. It's a spiderweb now that displays random colors. Is there any way to affordably replace the screen?
Thanks
screen repair.
these people can fix your screen: PocketPCTechs.com
if you found a new screen you can fix it your self ,its easy
just download the service manual and follow the steps for opening you device and change the screen with a new one
here is the service manual
http://rapidshare.com/files/50116541/htc_xda_ii-mda_ii_service_manual.pdf
but make sure you buy the correct screen there are 2 types A and B, B has a gold ribbon, A has a silver ribbon
dont know where you live but these are a uk supplier
Code:
http://www.apexlaptops.co.uk/htclcd.htm
(straight to the right page on their site)
Replacement screen
Thats way too much for a screen. I see them on ebay for half that price.
I have a Qtek 2020i and I had it all apart. The P/N 60H00022-03 is the screen I have in mine. It uses a little plug that connects it to the motherboard.
This is a link that explains in detail how to open the PDA: http://www.modaco.com/HTC-Alpine-dissassembly-t232579.html
BE CAREFULL taking off the antenna cover. The little tabs will break. I was able to do it, so you should be able to do it too. Good luck.
The manual in this post: http://rapidshare.com/files/50116541/htc_xda_ii-mda_ii_service_manual.pdf3 is for a different PDA. Be carefull, the antenna cover come off differently.
skeeve666 said:
but make sure you buy the correct screen there are 2 types A and B, B has a gold ribbon, A has a silver ribbon
Click to expand...
Click to collapse
You mentioned the two types of screens, do you know the effects of the wrong one being used. Cos i think that might be a solution to the problem im having.
DJKai said:
You mentioned the two types of screens, do you know the effects of the wrong one being used. Cos i think that might be a solution to the problem im having.
Click to expand...
Click to collapse
As best I can tell, the type "B" has a ribbon cable that is on the side. It has a little plug that plugs into the motherboard. This is the type I have in my Qtek 2020i. I believe the type "A" has a ribbon that is on the top and does not have a plug. I do not know how it attaches. They are not interchangeable.
This link will show you different screens: http://www.apexlaptops.co.uk/htclcd.htm
This is the screen I have.TD035STEB2 They must use their own part # .
Having just taken apart an XDA II in the (sadly vain) hope it's screen was the same as mine (I lucked out), I can tell you the following:-
The 'B' type screen (also known as a generation II screen I think) is the one you mentioned with the ribbon cable that has the small plastic plug on it, that plugs into a matching socket on the mainboard.
The 'A' type screen used in eary gen XDAIIi and XDAII (generation I screen) had a slightly different flexi circuit board at the back, the ribbon cable still extends out the side like the other screen, but it just ends in a row of shiny metal contacts. This plugs into a matching socket on the mainboard that has a flip-up latch to secure the cable once it's in postion. obviously there is no easy way to use a 'B' screen in an 'A' device and vice-versa as the actual device mainboards have different connectors and wiring layouts.
When replacing the screen it is easily possible to do it in under the 20 minutes of life you get out of the backup battery, so you shouldnt lose any data
(I have a B type screen on order from ebay atm to fix my PDA)
P.S while waiting for your replacement screen, use SOTI Pocket Controller to 'drive' your PDA from the PC (handy for finding out who the hell has texted you!) and Microsoft Voice Command will mean it can still be used for sending/receiving phone calls in 'blind' mode very easily.
Also, if searching on ebay for your replacement screen you can easily see in photographs the difference between the two ribbon connectors: all you need is one that matches the connector on your broken screen.
Hope this is of some help -
Joe Pinball, now owner of a surplus 'A' (plain ribbon, no plug) type screen if anyone wants to make me an offer?
Joe Pinball said:
Having just taken apart an XDA II in the (sadly vain) hope it's screen was the same as mine (I lucked out), I can tell you the following:-
The 'B' type screen (also known as a generation II screen I think) is the one you mentioned with the ribbon cable that has the small plastic plug on it, that plugs into a matching socket on the mainboard.
The 'A' type screen used in eary gen XDAIIi and XDAII (generation I screen) had a slightly different flexi circuit board at the back, the ribbon cable still extends out the side like the other screen, but it just ends in a row of shiny metal contacts. This plugs into a matching socket on the mainboard that has a flip-up latch to secure the cable once it's in postion. obviously there is no easy way to use a 'B' screen in an 'A' device and vice-versa as the actual device mainboards have different connectors and wiring layouts.
When replacing the screen it is easily possible to do it in under the 20 minutes of life you get out of the backup battery, so you shouldnt lose any data
(I have a B type screen on order from ebay atm to fix my PDA)
P.S while waiting for your replacement screen, use SOTI Pocket Controller to 'drive' your PDA from the PC (handy for finding out who the hell has texted you!) and Microsoft Voice Command will mean it can still be used for sending/receiving phone calls in 'blind' mode very easily.
Also, if searching on ebay for your replacement screen you can easily see in photographs the difference between the two ribbon connectors: all you need is one that matches the connector on your broken screen.
Hope this is of some help -
Joe Pinball, now owner of a surplus 'A' (plain ribbon, no plug) type screen if anyone wants to make me an offer?
Click to expand...
Click to collapse
Thanks for all the info. I thought the "A" screens ribbon cable extended from the top. Having never seen one, I learned something...
Thanks for the info. I ordered one from ebay which came from China and installed it and it works!
NHL Fever said:
Thanks for the info. I ordered one from ebay which came from China and installed it and it works!
Click to expand...
Click to collapse
how much did it cost you? just bought my dad one for his xda2 from uk for £36 inc postage. seen as screen are the same for both.
Hey guys if the screen is showing a blue tinge on what was suppose to be a white colour. Would it be a problem with the newly installed LCD/ or would it have been incurred by the damage it had before hence replacing the screen.
Thanks,
DJKai said:
Hey guys if the screen is showing a blue tinge on what was suppose to be a white colour. Would it be a problem with the newly installed LCD/ or would it have been incurred by the damage it had before hence replacing the screen.
Thanks,
Click to expand...
Click to collapse
you sure you removed the protective plastic when you installed it? or you have a cheapo screen protector?
i have noticed on my dads spanking new screen the colours are alot deeper than my oldie-second-hand-when-i-bought-it unit never owed a xda2/i from new so never seen a new screen LMAO
p.s. bought mine from ebay seller said the screen was scratched to hell, i have some of that cream that polishs out scratchs on screens so wasnie bothered, turned out it was only a screen protector it was perfect under it.
moral of the story is ALWAYS BUY A GOOD SCREEN PROTECTOR it will save you cash!

Dead Diamond - Flat cable ripped - what now?

Ok, my fault. While repairing I ripped the black flat cable that goes from the main board to the top board (there the cam and vibrator is located).
I can't simply change the cable since it's heat glued to the top board (on the mainboard it has a locked connector).
Any suggestion from the repair specialists here? I guess I have to replace the whole top module, that includes the cable.
Any idea where I can get one? Or is it possible the replace just that cable? Seems very difficult though (and I work in electronics)
Note: see the pix, there is a hairline crack on one side near the connector (center in the pix). It's completely open there.
Update:
There is now way one can replace just the flex cable coz it's heat sealed onto the top PCB. Only thing one can do is to replace the complete top PCB.
After some searching I found this interesting Taobao link:
http://item.taobao.com/item.htm?id=4686372956&is_b=1
That's the PCB I want! RMB98 is US$ 15.00 or so. However, I don't want to waste any money on stuff that doesn't work.
So I went to the "phone mall" in Shenzhen (Hua Quan Lu, near Saige). There were at least 10 shops with that module for my phone. I got one for RMB 90 and assembled my phone right away there.
After some fine tuning it worked. However, my phone has still the LCD digitizer problem and often (but not always) recognizes any touch only as a touch to the right side.
Another problem is that the G-sensor works only right-left axis and not up-down.
Since the digitizer change is quite difficult (even though the digitizer itself costs only $3 in China) I may just leave it like that. I bought already an HD2 anyway.

HD2 Repair

Hey guys,
The USB port of my HD2 broke off and I was forced to replace the motherboard. When I assembled the HD2 again, I could immediately see that there was something wrong with my screen. The screen couldn't display full color (only bright red/orange/white/dark green/cyan accents). Also, the 'hang-up button isn't responding anymore after I replaced the motherboard (and flexcable).
What happened? Is there something wrong with the lcd display or did something go wrong when I (dis)assembled the phone? I took the motherboard and the flexcable from another HD2 that had a broken display.
Thanks in advance.
bilaba70 said:
Hey guys,
The USB port of my HD2 broke off and I was forced to replace the motherboard. When I assembled the HD2 again, I could immediately see that there was something wrong with my screen. The screen couldn't display full color (only bright red/orange/white/dark green/cyan accents). Also, the 'hang-up button isn't responding anymore after I replaced the motherboard (and flexcable).
What happened? Is there something wrong with the lcd display or did something go wrong when I (dis)assembled the phone? I took the motherboard and the flexcable from another HD2 that had a broken display.
Thanks in advance.
Click to expand...
Click to collapse
So you completely voided your warranty through HTC and tried to fix the device yourself, then screwed it up. I'd still say send it to HTC and ask for a repair. I don't know if they'll do it or not, unless you used official parts. I know they do out-of-warranty repairs, but they'll charge you.....
Yep you screwed up the repair, those ribbon cables need a delicate touch & any handfisted moment ends up with what you have got now ...
Another careful strip & inspection of all ribbon connectors is needed ...
I bought it as a second-hand phone. The guy didn't give me a reseat and the HD2 was flashed a WP7 ROM.
For the button problem, how are you turning your phone on without that button? do you hear/feel it click when you press it? If not its just misaligned.the buttons are on a flex ribbon cable with two holes on each side. it fits on the plastic middle frame of the phone which has two small spikes coming out of it... it has to be perfectly placed for your buttons to actually click..
if the flex ribbon is broken however you can buy one off ebay for arround 10$ any will do, mine is not original works fine..
for the screen you could have messed up the lcd, did you separate from the glass-digitizer? if you did you probably screwed it up.. its not a easy thing to do.. also was not necessary for your repairs
the connection to the motherboard might not be all the in and clipped which might cause your problem... (being that two of the little pins provide voltage and ground while all the others provide data information if one of those pins is not in all the way a piece of data might not be displaying for example a color. Never seen that happen its theoretically possible thou)
well I have only opened my phone 3 times and dont claim to be a expert.. but this is my take on it... Good luck!
@pablow Thanks for the detailed response.
The HD2 is only turned on, after I place the battery. Otherwhise it won't start.
I hear a click on the (broken) 'off' button, everytime I press it. I also noticed that the inside of not all of the 'spikes' are empty. I can see a bit of the flexcable in the spike of the broken 'off' button. The spike of the (working) 'call' button is empty.
I think that the flexcable hasn't been connected securely to the motherboard. I'll try connecting everything again tonight.
not that it makes much difference but HTC wouldn't of fixed it through warranty because of usb damage anyway
I thought so, thanks for the heads-up anyways.
[Solved] Display is fixed
Update:
I disassembled the HD2 and reconnected everything (from coax to flexcable). Fortunately it worked! The display is how it should be.
I have another problem now. All of the buttons don't work now, exept for the dial button. Do these buttons break so fast? It's annoying as fuark, because I have to disassemble it another time in the future to fix the buttons.
I also couldn't re-attach the volume control tab when assembling the HD2.

[Q] Help, need the FPC/FFC connector for LCD on motherboard (broken LCD connector)

anyone know where to get the LCD connector on the motherboard from a Sprint HTC One?
as the picture shows, I've got a broken one that needs replacing.
It's 31 pins. The closing lever is on the back behind the slot to insert the LCD ribbon (white lever in picture). I think it's called an FPC or FFC connector. But I don't know the pitch.
thanks.
While I realize this post is some two years old, it came up pretty high on google search results, so I'm going to answer for the sake of anyone else that has this question and finds this post.
Code:
http://www.parts4repair.com/lcd-screen-fpc-connector-for-htc-one/
this appears to be exactly what you're looking for, but it looks to be a daunting task to replace.

[Q] M7 no display after replacing battery

Hi
I tried to replace my battery and after assemble it back i only get a black display when turning my m7 on.
I broke this little plastic thing from the display cable off (look in attachment)
Is this thing essential for a working display? (i thought i can fix it with a drop of glue)
Should the display work when the backcover is off the device? Because there are some connectors on the backcover....
cheers
00Nuclear00 said:
Hi
I tried to replace my battery and after assemble it back i only get a black display when turning my m7 on.
I broke this little plastic thing from the display cable off (look in attachment)
Is this thing essential for a working display? (i thought i can fix it with a drop of glue)
Should the display work when the backcover is off the device? Because there are some connectors on the backcover....
cheers
Click to expand...
Click to collapse
Shouldn't have done that, I think you accidentally broke something. I'd send it to a HTC service center. But that's gonna cost you probably.
nah, official repair isn't worth it. The phone is more than 2 years old...
and yes i think i broke something... thats why im asking
You're gonna have to be good with a solder and a couple of tiny wires if you want to revive your phone.
00Nuclear00 said:
Hi
I tried to replace my battery and after assemble it back i only get a black display when turning my m7 on.
I broke this little plastic thing from the display cable off (look in attachment)
Is this thing essential for a working display? (i thought i can fix it with a drop of glue)
Should the display work when the backcover is off the device? Because there are some connectors on the backcover....
cheers
Click to expand...
Click to collapse
You definitively need this clip to be intact so the flex cable sits firmly in place otherwise you'll have bad contact between the cable and the pins.
If you don't want to send to HTC for repair you'll need at least to send it to your local electronic repair shop so someone skilled with the proper soldering tool (not the standard iron you have at home) can replace the connector. BTW some of these clips must be lifted from the cable side and some other from the opposite side of the cable, so next time use tweezers and apply very light force on each side you'll find from what side it must be lifted.
LCD should work fine with the back cover removed, afaik. Connectors in the back cover are often for antennas but I wouldn't recommend to run the phone with antennas disconnected to avoid damaging the radio chips (reflected power).
If you are from the US, you can easily find this connector on ebay for about 10$. I'm sure it won't be that much expensive to repair if you bring the new connector and the phone already disassembled to your local repair shop.
Btw are you sure its only the LCD? When trying to boot the phone can you here the HTC theme or does it vibrate? Recognized by your computer when connected with usb?
thx for your response
I found an replacement part on ebay but first i have to look for someone who can solder this for me.
When i try to turn it on it only vibrates without a htc theme sound and there is no display reaction.
The other thing i mentioned is that the phone gets very hot in the middle (should be the cpu) where i dont know if it should get that hot.
I have to try the pc connetion again and let you know asap.
00Nuclear00 said:
thx for your response
I found an replacement part on ebay but first i have to look for someone who can solder this for me.
When i try to turn it on it only vibrates without a htc theme sound and there is no display reaction.
The other thing i mentioned is that the phone gets very hot in the middle (should be the cpu) where i dont know if it should get that hot.
I have to try the pc connetion again and let you know asap.
Click to expand...
Click to collapse
I'm not really worried about the absence of HTC sound when booting, if your phone is on silent / vibration mode, it will only vibrate when booting. If your computer does detect it once booted, then I guess the broken connector clip is the problem.
---------- Post added at 09:49 AM ---------- Previous post was at 09:27 AM ----------
Here is a video about the connector replacement, it doesn't look that hard to replace but wouldn't recommend to do it yourself if you never soldered electronics before. Soldering isn't that hard but you need some practices and knowledge to make good joints. I don't think your phone motherboard is a good candidate to practices yourself if you never did it before. You'll also need a really tiny tip for your iron, probably a type "L", 50/50 solder + some flux. Flux must be cleaned after use to avoid corrosion. The most difficult when soldering on motherboard, imo, is to find the right temperature. If your iron is to hot, you'll damage your connector. If its not hot enough, solder will take more time to liquefy and some heat will be absorbed by surrounding components which can cause irreversible damage.
Easy fix mate
You don't need to replace the connector, I've done this before, it is just the connector clip that has come off and it goes back on reasonably easily.
You will need a good magnifier.
You will need a good light source.
The phone held securely on its side with the socket pointing up.
Some masking tape on the loose part because it WILL go "ping" into the distance if you don't and you will not find it.
Look at the other connectors to see the proper orientation for the part, mark it with a permanent marker on top and at one end.
The insertion looks difficult, it isn't too bad, keep the part nice and straight and the motion is kind of like clicking it down on the ribbon.
Forget replacing the connector, that is 100 times harder.
If you do lose the loose part I have one or two laying around.
Good luck.

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