Texicore

Hello!

 

First time poster here. I think this is probably the best place to post this, as I only buy my parts from Replacebase.


So I bought the non-oem LCD, two of'em. Tried both on a phone that had huge gaping holes in the screen (glass broken off). Replace the LCD with new one, screen dim and it flickers from dim to bright sometimes. At some point the phone didn't even wanna turn on, after I had tried the other new LCD and the original one.

After letting it sit for a few hours and charging it a bit, it now doesn't flicker at all almost. Maybe 1/10 times when using it, and it's a very weak flicker. The screen is just dim now. 

 

Now, I'm just trying to rule out the faulty parts here. I came to the conclusion that it's probably not the screen, as the customer said the screen was also dim a few days ago before he stopped using it. 

So in that case, it's the mainboard? If so, would it work for me to just replace it? Never replaced a mainboard before, but I understand that it has to be from the same region, same GB (16gb) and also not locked with iCloud? 

 

 

Thanks in advance for any reply!

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Bytesize
Hi, if you have ruled out the screens then next would be the circuit, you can have someone test the backlight circuit make sure the filter is still seated correctly (may have been knocked whilst removing the screen connectors), a dim light could be a failing coil (I know, I know some may say it's never the coil but sometimes it just is and is a strong possibility with a dim backlight)
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JesperB
Hi,
it is definitely the backlight, test it for continuati..see picture👍😊
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Texicore

Bytesize wrote:
Hi, if you have ruled out the screens then next would be the circuit, you can have someone test the backlight circuit make sure the filter is still seated correctly (may have been knocked whilst removing the screen connectors), a dim light could be a failing coil (I know, I know some may say it's never the coil but sometimes it just is and is a strong possibility with a dim backlight)



Is there any tool I could buy to test this myself? The backlight circuit that is. 

I did test two screens, so it's definitely not either of those. But when people say "backlight circuit" they mean the one on the mainboard then I assume, and not something with the screens. If that's the case I'd just want to try and get a new mainboard.

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Texicore
JesperB wrote:
Hi,
it is definitely the backlight, test it for continuati..see picture👍😊


Thanks for picture! Don't have any tool to test it with tho.. any suggestions as to where I could get that?
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Bytesize
Any test meter will do a continuity check but since you say it's flickering that would suggest the filter might be ok, I would use a pair of tweezers making sure the battery is disconnected and gently see if the backlight filter will move, if it does then it needs to be soldered back in to place, alternatively send it out to someone who does this sort of work, there are a few on here including myself that specialise in board repair.
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