pc engine doesnt power on but also does?

I recently successfully RGB modded my PC engine but now it doesnt power on anymore, except when I turn on my megadrive also (on the same RGB scart divider as they bleed trough each other, thus I can see it also turning on and working normally (as colors are still intact) ). I've tried different power supplies, but no luck.

What can be the problem? And how could I fix it?

 

Have you tried using it without your SCART switcher?

 

I assume you used the transistor method?

You have probably blown the fuse. Use the THS amp method next time

 

I've used the THS amp method, and I haven't blown the fuse.

 

I've got videos of the issue:

http://www.dailymotion.com/video/x1nuzz1_pc-engine-power-issue-1_videogames
http://www.dailymotion.com/video/x1nv1vt_pc-engine-power-issue-2_videogames

Edit: Problem is fixed, the fuse got loose...