Does anyone know where, precisely, the WiFi antenna is located and what, if any, relation it may have with the thumb-print sensor? I was replacing the motherboard and I accidentally broke the thumb-print sensor ribbon connector off the motherboard. The thumb-print sensor is not that important but if the x4 was using the thumb-print sensor ribbon as a WiFi antenna, then I'm in trouble.
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Hi
I opened up the s730 all the way down to the keyboard to be able to put some glue on the broken keyboard frame.
Adfter the phone was assembled back again, the screen does not rotate when the keyboad is slided in and out.
Anybody who knows were the sensor is located?
I have the same problem, but it happened when I changed the housing.
Everything seem into place, but the d"#$%$ keyboard does not work.
Regards,
OB
I also posted about this exact issue, doesn't anyone know where the sensor is?
not all time is about a spoiled sensor because the sensor can be conected with mainboard throught the flex cable if it is broken will not work specialy when its a chase replacement , the flex cable can be damaged very easly
Due to moisture both Light and Proximity Sensor are now not working :/
Lost also warranty because of this.
Now I have to replace the part where the sensors are by my self or pay 100 eyros for service...
Has anyone any idea what spare part am I looking for?
And any idea where I can get that spare part?
Thx in advance!
HTC HD2 Flex Cable: Location of the Sensors
For those who have the same problem...here is the spare part:
HD2 Flex Cable:
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.
As weird as it sounds, touch screen does not work but the S Pen does. I know the obvious reaction would be that the digitizer is bad BUT, I took the motherboard out of my other Note 3 and placed in this phone and the digitizer functions just as it should. It is as if there is something wrong with the motherboard but I'd like to see if it is fixable or if anyone else has had this issue. Any suggestions on how to correct this without getting a new motherboard? Any help is appreciated. Thanks.
Current OS: MJ5 4.3
That happened to me twice. Once a week after opening it, and a factory restore fixed it. It happened again about 6 months later, and I had to send it back.
It could be anything from a bad chip on the motherboard flaking out once in a while to a bad connection on one of the pins on the screen cable. A dirty pin is fixable most of the time, a bad chip isn't.
(The S-Pen has nothing to do with the digitizer - it doesn't press on the digitizer, it interacts with a magnetic field the phone produces yjat runs about half an inch above the screen [see how high you can lift the pen before you lose the "pen cursor"]. The pen will work even if the digitizer is shot. On the other side, if the magnetic field or associated circuitry is bad, the pen won't work even though the digitizer does.)
Hello,
I got a Pumpkin Android Radio one year ago, it works fine.
A few weeks ago the touchscreen turned black, backlight is on, touchscreen works (touching the screen is recognized by the OS, music is playing,), but it shows nothing.
I know a bit where the "touch-buttons" used to be. I can rarely use the unit with touching in the right places to get music to play.
The only thing I did, was reposition the GPS mouse in my car maybe one week before the screen went black.
I only moved the mouse, I dont touched the radio at all.
I installed also an App to show the connected GPS-sattlelites the week before.
I don't know what happened.
I had no time to look up the failure, so I leave it 2 weeks with this error, and sometimes the display showed up again after 30min, sometimes after 5 min.
Really strange.
I am an electrician, so i thought that there must be two foil-ribbon cables for the display, one for touch, one for the display, the display cable must be loose.
I opend the unit but both connectors where in place and fixed with a drop of adhesive.
I looked a bit around.
On some point I found a soft switch button falling out the unit onto my desk.
At first it looks like an SMD coil, but it is a switch, like the ones from the front tactile buttons.
It looks like it breaks of the solder pads, but only on one side, the other side had no solder on it.
I checked all the boards but no switch button is missing.
I am not shure where the button came from, but it fall out of the unit, as i was looking around and shifting and tilting it.
My conclusion: They lost a switch in the factory and it fall into my unit. By car vibrations this stupid useless button shorted out some connection and now the display path is broken somehow.
So what i did so far, without fixing the problem and without breaking something, the unit is still working with the black screen and operation by blind touching works:
- checked the reverse input switching
- opend the unit
- checked the boards optically
- removed all foil ribbon cables
- DVD
- display "data"
- display touch
- main foil ribbon cable from the mainboard to the front daughter board
- small foil ribbon cable from the mainboard to the front daughter board
- ribbons from the daughter board to the two outer boards with the soft switch buttons
- I carefully disassembled the display unit, its a HannStar 721CT10255-A0 or WD010GHL40AE-D5
- resoldered some connections between on the "ribbon cable interconnection" between the original TFT and the "HannStar"-Connector
- I dismounted the daughter board an cleaned it with a board cleaner (some flux where left from the factory)
- I clean all ribbon cable connectors with a contact cleaner
- I dismounted the PX5 head board and cleaned all connections with contact cleaner
- I resoldered the doughter board with hot air and all ribbon cable connectors between the daughter board an the mainboard
- I resoldered the pins on the head unit with a small tip soldering iron
I looked up my flying around 7" Displays but they are not compatible.
I am not familiar with these units, but as i understand it:
The video signal from the head unit gets to the STM32F091 chip, gets muxed (rear camera, Aux, etc.).
after that it is send directly to the display.
On the daughter board there is a CHRONTEL 7026B-TF, but if i look up the pinout of this chip, its not connected to the display, as far as I can tell.
I am now at a point where it might be the extra useless button that killed something by shorting out some traces, the display itself is broken, the STM chip died on the display pins, or its not a hardware problem.
Is there anything I can test to determinate if its a hard- or a software problem?
Thanks for your help and I will appreciate your support.
( i have some pictures, but I am not allowed to post them)
Now i checked the connector of the Display with an oszilloskop.
I could not find a datasheet for the "D5" of the Display, but i found a WD070GHL40AE-C3 from "HannStar" which look quiet similar.
The shown pinout matches the design on the board.
I found out, that the CLK Frequency is 1213 kHz and the RGB Input are all in sync with the clock frequency.
That makes no sense to me.
I followed up the traces on the board, and they go directly to the head board (PX5).
There is a parallel chip (GM8284DD) to the RGB and CLK line, but it seems that this chip takes the signals and converts them to the Chrontel, but I can't find any datasheet.
So it a software problem or the graphics unit has died ... any suggestions?