Bootloop to recovery issue. - Galaxy S II Q&A, Help & Troubleshooting

Hi guys.
I seriously need help right now.
My friend bought an s2 i9100 in cheep which was stuck on bootloop and he thought it could be repaired.
so we don't know what caused the problem.
But i was surprised that few repair shops weren't able to fix it.
let me explain the problem:-
when we hold power button or plug in a charger it show the logo, goes into recovery and reboots repeating it in loop.
so whenever i charge it goes into this loop.
we can use volume up & down key in those 2-3 seconds in recovery but not the power key.
we can access download mode and it doesn't reboots automatically but going into recovery mode manually also start this loop.
it's like we are only going in recovery mode again & again.
i installed this file "I9100XWLPW_I9100ODDLPC_I9100DDLPB_HOME.tar.md5" through odin and also used the pit file "I9100_STOCK-System_2GB-Data_512MB-Preload.pit" but nothing changed.
i don't know what to do now.
i cant find any gingerbread rom to test.
i don't know how it can be fixed,
so please help me.

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Update
After doing a lot of things I finally managed to boot into system but the problem is not solved.
I flashed i9100XXLSJ which had modem and CSC files other than the PDA only.
The device actually booted in system (just the samsung logo) but it was a bootloop.
This time I kept holding power button by which the bootloop stopped and it successfuly booted but power button is not working inside the system so I can't reboot, power off or even switch on the screen.
By holding down up vol + home + power for a considerable long time I can boot into recovery. But again the power button is not working so I can't select any option.
I flashed a cwm touch recovery which is working.
So can anyone tell me what is the problem here and what can I do to actually fix it.

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If you have problems with flashing stock ROM, consider flashing a custom ROM, like Cyanogenmod.

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BenjyTec said:
If you have problems with flashing stock ROM, consider flashing a custom ROM, like Cyanogenmod.
Click to expand...
Click to collapse
The problem is not about flashing it's about the bootloop & tell me can I flash cyanogenmod with Odin?

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@kuro2052
Try flashing the 4.1.2 JellyBean leak ROM via ODIN linked in this thread (scroll down to you see "Another option for i9100"):
[GUIDE][Troubleshoot a failed Odin flash]
This will factory reset the device which may hopefully resolve your problems.
gsstudios

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gsstudios said:
@kuro2052
Try flashing the 4.1.2 JellyBean leak ROM via ODIN linked in this thread (scroll down to you see "Another option for i9100"):
[GUIDE][Troubleshoot a failed Odin flash]
This will factory reset the device which may hopefully resolve your problems.
gsstudios
Click to expand...
Click to collapse
Actually the ROM you are talking about is the ROM which I flashed which is mentioned in my second post " update".
PDA = CODE_I9100XXLSJ.tar
PHONE = MODEM_I9100XXLS6.tar
CSC = CSC_HOME_OXX_I9100OXXLS1.tar.
That's how I got this far, previously it was impossible to boot into system.

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kuro2052 said:
After doing a lot of things I finally managed to boot into system but the problem is not solved.
I flashed i9100XXLSJ which had modem and CSC files other than the PDA only.
The device actually booted in system (just the samsung logo) but it was a bootloop.
This time I kept holding power button by which the bootloop stopped and it successfuly booted but power button is not working inside the system so I can't reboot, power off or even switch on the screen.
By holding down up vol + home + power for a considerable long time I can boot into recovery. But again the power button is not working so I can't select any option.
I flashed a cwm touch recovery which is working.
So can anyone tell me what is the problem here and what can I do to actually fix it.
Click to expand...
Click to collapse
In CWM touch recovery, you can swipe (or touch) to confirm the option.
Try factory reset. Reboot.
If that doesn't help, try wiping system, cache and data.
Let me know how that goes
gsstudios

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gsstudios said:
In CWM touch recovery, you can swipe (or touch) to confirm the option.
Try factory reset. Reboot.
If that doesn't help, try wiping system, cache and data.
Let me know how that goes
gsstudios
Click to expand...
Click to collapse
Wiping data/factory reset and cache doesn't solve the problem.
There is format option in 'mounts and storage' so I formated system, data, cache & also emmc. But the bootloop is not gone. The only thing that is gone is the ROM because of those formats. I have yet to to install the ROM again.

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maybe is a faulty power button... Do u have to push it down a little harder than normal?

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affigne said:
maybe is a faulty power button... Do u have to push it down a little harder than normal?
Click to expand...
Click to collapse
It might be the problem of power button. Sometimes it boots as soon as I put the battery. It always boot when I plug in charger. Sometimes it boots after I press and hold the power key for maybe 15 second & sometimes it doesn't boot when holding power key & I have leave hold again to boot it. And important thing is when it boots, I have to hold the power key until the key lights up to stop it from bootloop but then the power is Jo longer functional in system. Same goes for recovery. But this is the only till nowROM which actually boots into system. Other ROMs were booting into recovery automatically.
I wanted to test cyanogenmod but I am not able to install twrp. I followed the steps here using HeimdallSuite https://twrp.me/devices/samsunggalaxys2i9100.html
I had no problem in the steps but the recovery is not actually replaced when I boot into it.
The recovery that I have currently is not able to flash isorec_twrp or any cyanogenmod directly. It always shows error code 7.
I am going to replace the power button with my friend's s2 (other friend who have an s2 laying around) only to see it works.
Anyways tell me how to install twrp successfuly.

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The actual power button needs to soldered, I thought It would be a connector, so I am not going to do that. But as far as I can tell, the plastic button isn't the problem.

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kuro2052 said:
It might be the problem of power button. Sometimes it boots as soon as I put the battery. It always boot when I plug in charger. Sometimes it boots after I press and hold the power key for maybe 15 second & sometimes it doesn't boot when holding power key & I have leave hold again to boot it. And important thing is when it boots, I have to hold the power key until the key lights up to stop it from bootloop but then the power is Jo longer functional in system. Same goes for recovery. But this is the only till nowROM which actually boots into system. Other ROMs were booting into recovery automatically.
I wanted to test cyanogenmod but I am not able to install twrp. I followed the steps here using HeimdallSuite https://twrp.me/devices/samsunggalaxys2i9100.html
I had no problem in the steps but the recovery is not actually replaced when I boot into it.
The recovery that I have currently is not able to flash isorec_twrp or any cyanogenmod directly. It always shows error code 7.
I am going to replace the power button with my friend's s2 (other friend who have an s2 laying around) only to see it works.
Anyways tell me how to install twrp successfuly.
Click to expand...
Click to collapse
Since I was on leaked JB firmware, what I did was to install philz recovery via android stock recovery, then install latest dorimanx isorec recovery/kernel, then install TWRP...
---------- Post added at 01:10 AM ---------- Previous post was at 01:09 AM ----------
kuro2052 said:
The actual power button needs to soldered, I thought It would be a connector, so I am not going to do that. But as far as I can tell, the plastic button isn't the problem.
Click to expand...
Click to collapse
check the battery contacts...