Phone doesn't boot, please help! - Galaxy S II Q&A, Help & Troubleshooting

The current situation is that after the splash screen is seen, the phone is completely black and shows nothing.
Download mode and recovery mode do work.
What I did that caused that was:
1. Followed this guide in order to root the phone:
https://www.youtube.com/watch?v=wLQ51Pg77q4
The phone worked well after that.
2. Tried to install this zip by placing the zip file in the phone, restarting while holding volume up + home + power, and choosing to install zip from folder.
So probably step 2 was wrong. Please help me to fix the situation, and tell me how to do the second step correctly.
Thank you
Guy
UPDATE:
I flashed the root file again, and the phone works now.
Please tell me how to perform step 2 properly.
Thank you

Stop making a separate thread for this same issue every few days I.E make this the last thread you make about this issue. If you need further help in a few days/week/whatever, post to this thread, don't make another one.

This is a completely different issue, and this is only the second thread I open.
My previous phone is dead, I received a new phone and am now trying to install a new ROM on it. It has nothing to do with the dead motherboard of my previous phone.
Your help will be appreciated.
Thanks

How was anyone meant to know you got a new phone.

Nobody should care whether it's a new phone or not.
I wrote the exact situation and how it happens exactly.
Nobody should remember that few days ago I was talking about a non-working phone. This new thread is a new problem, starting from scratch.

I can assure you I dont care.

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http://forum.xda-developers.com/showthread.php?p=15632108#post15632108
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Question Phone stuck in fastboot loop

Hello! So awhile ago, I decided to try to root my new phone, ensuring model and etc was correct (CPH2459, this should be the usa unlocked variant right?) annddddd... it did not turn out so well. I had a friend recommend I reset- (which I mean I don't see what that would do but I have bootloader already unlocked so..) which just led me to being stuck on the setup screen where i cant get past wifi without my phone restarting- without fail to that as well. Also like touchscreen didnt work half the time and physical keys (Power, Volume) didn't seem to respond when the device was on either (excluding for a hard restart).
I followed this guide step by step (in no way blaming those individuals) https://forum.xda-developers.com/t/...guide-from-fastboot-obtain-root-more.4495801/ and my phone is now stuck in a fastboot loop.
I do wish to clarify that I am sure I followed step by step, I didn't make a backup though as the initial guide didn't present how to do so.
I'm honestly afraid to do anything more to my phone, and I really do need this to work as it just happens my other phone broke recently. Would appreciate any help so, very much, I have no idea what I'm doing and I haven't the slightest clue as to what may be wrong.
I do understand this question has been asked a bit with this phone and there are other threads, but I couldn't find my answer. So I'm hoping for some direct help.
nemmieve said:
Hello! So awhile ago, I decided to try to root my new phone, ensuring model and etc was correct (CPH2459, this should be the usa unlocked variant right?) annddddd... it did not turn out so well. I had a friend recommend I reset- (which I mean I don't see what that would do but I have bootloader already unlocked so..) which just led me to being stuck on the setup screen where i cant get past wifi without my phone restarting- without fail to that as well. Also like touchscreen didnt work half the time and physical keys (Power, Volume) didn't seem to respond when the device was on either (excluding for a hard restart).
I followed this guide step by step (in no way blaming those individuals) https://forum.xda-developers.com/t/...guide-from-fastboot-obtain-root-more.4495801/ and my phone is now stuck in a fastboot loop.
I do wish to clarify that I am sure I followed step by step, I didn't make a backup though as the initial guide didn't present how to do so.
I'm honestly afraid to do anything more to my phone, and I really do need this to work as it just happens my other phone broke recently. Would appreciate any help so, very much, I have no idea what I'm doing and I haven't the slightest clue as to what may be wrong.
I do understand this question has been asked a bit with this phone and there are other threads, but I couldn't find my answer. So I'm hoping for some direct help.
Click to expand...
Click to collapse
I'm guessing you noticed that the link they posted for the downloaded ota is the gn22000 model correct? yours is CPH (as i saw you stated) so i was just double-checking to make sure you didn't download the wrong variant's ota..

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