Minecraft won't open after installing mods?

OK I used to play minecraft a lot but, since the new installer I just didn't play it all to often but, I wanted to give it another go. I used to install mods manually but, I couldn't figure it out from the new installer so I said f**k it and used FTB, TechnicLauncher, and even skydaz installer to help me install and whenever I try to run any of them something weird happens… It fully loads and never comes up with the mincraft screen. Not even the crash screen comes up. The TechnicLauncher doesn't even full load before the "checking" stops halfway through. I can run vanilla just fine, but even with the simplest mods installed t won't work.