[Q] Black screen after changing compleet unit S4 - Galaxy S 4 Q&A, Help & Troubleshooting

Hi,
After dropping my S4, the screen went black but still turn on .The led and the buttons above and below turn on.
I buyed a new screen, but it still will not turn on.
If someone an idee why ?
thank you for help.

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Bricked Trinity?

HI all,
i have an SFR300+ also called Trinity. I never customize him or anything. Since this morning when i turn him on , the green led turn on and turn off but the screen is black with light on(retrolight? in french retroeclairage). if i turn him on and clicking some button it appears the "very nice colored logo SFR" but he is blocked here. when i turn him on as bootloader mode, he turn on but always with black screen and light on.
i don't think it is the screen cause i saw it ok.
when i try a hard reset i saw options, i make it and he's trying to reboot but black screen and light.
i try unbrick with splxploit but it doesn't work. and with -c 1 and 2 and 3.
I hope there are some way to my pda
Sorry for my so bad writing, i try to do the best.
Thank for your help!
Edit [ maybe can help, when i'm on bootloader mode i know it's ok because i can use unbrick, and it's recognize the phone and saw SPL number etc... ]
UP
No one?
i've resolved my problem, it's an hardware problem. the left bottom connector is tired.
so thank you all!
I have nearly same problem ... but when my trinity runs any "complex" process it just have scrambled sreen and soft reset. Then black screen with light. And when i want to turn trinity on ... it always have black screen with light but sometimes it just normally turn on. And what is that left bottom connector ? You meant HTC-Ext ( Mini USB ) ?

[Q] HD2 screen , help

I dropped my hd2 Saturday on the left bottom corner , since then the the screen stayed black But the phone turns on and screen responds & also charges I just can't see what I'm doing since the screen won't turn on , and the button lights still light up when on but not the screen
so if anyone knows what's wrong please help?

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I upgraded my i9505 to official 4.3 and i'm observing that the s-viewcover when closed, dim the screen and turn to clock and date as it should, but the screen actually never goes completely off.
It's stays permanently on, like a dock or some like this.
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Cheers

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Hi
i have an xtrons td-714sgd where there is black screen
I know well why because I by mistake got changed light on screen
i have tried to reset and disconnected power but it does not work
Hope you can help me

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