Why doesn't my Samsung Galaxy S II wanna start?

[AC Question]

Samsung galaxy s II doesn't wanna start

Yesterday I Installed android 5.1 on my Samsung Galaxy S II with help of a tutorial video( The ROM I installed CM 12.1 Android 5.1.1) it all worked fine downloaded some apps like Pokemon go and it still worked fine until a update of cyanogenmod came up so I installed it restarted the phone, then the wifi connection started to do weird so I went to updates to see if there was an other update which I might have missed. There was one so I clicked it downloaded the update then I saw it was an old update. When the update rebooted the phone it didn't wanted to start. Tried to get in recovery mode but that didn't work.

When I start the phone I get the start screen
Samsung Galaxy S II
GT-I9100
Yellow triangle with a exclamation mark
then the screen turns black and nothing happens

When I try to charge the phone
the screen stucks on the battery loading image

Hopefully someone has any ideas how to fix this problem and get my phone on and working again

 

[Rmj_Nexus 5]

Re: Samsung galaxy s II doesn't wanna start

You have to be able to run 4.4 at least

Posted via the Android Central App

 

[AlphaTango414]

Re: Samsung galaxy s II doesn't wanna start

Reflash stock firmware via Odin if you are unable to boot into your custom recovery.

 

[Mhemingson]

Re: Samsung galaxy s II doesn't wanna start

So I Reflashed stock firmware via Odin the traingle is gone when I turn the phone on but now it keeps stuck at the samsung screen
Any ideas what to do next?

 

[Mhemingson]

Re: Samsung galaxy s II doesn't wanna start

Problem solved!