phone wont turn on after repair

[seanmcd]

Ok guys im new to this forum

I replaced the lock button for a friend, which I think went well, but after putting it all back together it won't turn on or charge. I have checked all connections and there good, any ideas what the heck iv done?
Thanks in advance

 

[Pinkpoison]

hello,moved your post here for better help.

 

[seanmcd]

Thanks