What would cause the left Capacitance light to be dimmer than the Home and the Back capacitance light. Are there 3 LEDS and possibly one is burned out on that side or could there be something in the screen itself that is causing "interference" with the light getting to the Menu button such as a piece of tape or ribbon cable etc.
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So I was thinking today, would there be any way to re-assign the red trackpad light as the notification light? I know it wouldn't make any real difference, but I personally think using the trackpad would look pretty cool compared to the standard tiny green LED.
Red light from trackpad - just like in optical mouse, ONLY for identification
The trackpad is not using a LED but instead a diode. Seeing it glow only means that there's a hardware problem in your phone as the current flowing in your phone not normal. Diodes used as sensor aren't usually made to light up.
Maybe I'm just a little too picky or ocd but I noticed my charge status LED goes from a brightly lit red just before reaching 100%, to an extremely dim (barely visible) green when the battery has been fully charged. When I hit the home or power button to turn the screen on then back off, the green LED is visible and bright. Anyone else notice this?
[UPDATE] Never mind, I'm an idiot... I should've known this, the light sensor dictates the LED brightness level.
I don't know if samsung was just rushing to get these replacement devices out and had to speed through the assembly process but my device looks just that way. The overlay is noticeably off center to the left across the top where the sensor, camera and iris scanner are located. To the left of the home button there is a thin vertical line indentation as if there is a small dent on the shell of the device under the overlay.
Once again, could be I'm just overly critical, but for a device pushing the $900 retail mark I expect more. Venting complete...Still love my Note 7:good:
Thought I was super careful sliding around the edge to release the screen from the adhesive but accidentally cut/tear part of the ribbon cable circled in green. (
https://imgur.com/nCgfvV1
)
Everything still works after swapping the battery. Except screen turns off with active edge guester squeezes. Unlocking turns it back on.
What exactly does those connection for on the ribbon do?
Hi,
My customer brought to me a Samsung A40 after water damage. After cleaning up and replacing the screen to the original one everything looked great until the first call. It appeared that both the light sensor and the proximity one are not even visible under *#0*# menu. I can easily bypass that by switching the power off button to end the call but since then the smartphone also doesn't turn off the screen :/
I've set to turn off the screen after 15s, udpated the software, performed wipe cache and full factory reset. None of them had worked. Screen if not manually locked remains ON all the time. Can it be connected somehow to the damaged sensors? During the call screen is still blinking.
I would be gratefull for any tip in this case.
I can even root the device to just get rid of that "not turning off of the screen". Is there some app maybe to force screen lock after some time of not active?
BR
Check for moisture and/or corrosion on the ribbon cable connectors.
Water damage is unpredictable especially if the battery is not pull immediately.
The best thing to do is flush liberally with anhydrous isopropyl alcohol* and completely dry.
Salt water is always lethal... eventually.
*isopropyl or any solvent will poison LCDs, never use it near them. Use best judgment otherwise.
blackhawk said:
Check for moisture and/or corrosion on the ribbon cable connectors.
Water damage is unpredictable especially if the battery is not pull immediately.
The best thing to do is flush liberally with anhydrous isopropyl alcohol* and completely dry.
Salt water is always lethal... eventually.
*isopropyl or any solvent will poison LCDs, never use it near them. Use best judgment otherwise.
Click to expand...
Click to collapse
Thanks for the reply. I've already put the phone apart and cleaned every single pcb, connectors, cables with isopropyl in ultrasonic wash and manually with toothbrush. Left it to complete dry for about 48 hours and put it back together. Before that the phone was completely dead. Now everything is working except those 2 sensors. I don't have any datasheet to this mainboard so i don't even know what else can I measure.
Whole thing happened like 2 months ago and the customer just tried to manually lock the screen but its not always possible and he noticed that his battery is drawing pretty fast due to screen on. On the current stage I'm just looking for some workaround to force the screen sleep and remains until power button pressed.
What is funny. The screen goes to sleep after 15s when connected to charger and locks after 1 minute just like I've set in the settings...
When it is inpluged from charger screen remains awake all the time :/ Maybe that's some clue for anyone?
More tests: light sensor seems to be working correctly. It adjust brightness when covered and uncovered despite the fact that it is not visible under "sensors" in "*#0*#" menu Proximity sensor still doesn't work. When calling someone screen remains black and just flashes from time to time...
But the main problem is still with those screen always awake. It is only going to sleep when connected to PC or charger :/ No moisture visible anywhere. I've found a post with the same problem but there was visible that phone was detecting periodically USB connection when it was unplugged. In my case Samsung is not noticing anything on tray etc. It just remains awake until pressed power button or connected to charger
I will try to replace USB charging PCB and give You the feedback
Maybe contacts on a BGA chipset corroded and shorted out a logic circuit pathway.
If it's under a chipset... game over, however it may on be an accessible area. Optical aid and good light.
It's also possible the water shorted out something enough to damage a chipset.
Replacing the USB PCB did the job. Everything works correctly, screen is going to sleep. Moreover the proximity sensor has started to work correctly
We may close this topic.
For the record, you can use *#77692# for the light sensor and proximity sensor if they don't show up in *#0*#.
so to tell in brief what i did today i took it in the rain running
i cleaned it with sanitiser
here is a picture can anyone tell me if this can break my display in long term is it repairable ffor cheap
and kill my phone its in the right hand corner
What phone and type of display?
Looks like you got water inside.
Power it down immediately.
Pull rear cover and pull the battery, ASAP!!!
Place in a warm, dry room with a fan on it for a few days.
Connect battery, boot and inspect display.
Reassemble if ok, use new OEM seal for rear cover.
No time to dilly-dally Mr. Wick... tic-tok
The screen brightness and color are adjusted automatically to react to ambient light conditions. Usually the change is so gradual it's barely noticeable, but can be fast if the light hitting the screen changes rapidly and substantially. You can choose to disable this behavior, but you should give it a chance first