Salut,

Je reviens plus vite que prévu, j'ai fais une petite recherche sur le net et sur un forum, je viens de trouver ça (j'espère que tu parles anglais) :

wolfden
12th of September 2011 (Mon), 17:16
Think mine is defective, worked great first day onboad and via wireless, did about 10 shots and went to use it today and it won't charge up. I get the solid green light and than the PL after 20 seconds. Fresh batteries, store batteries, rechargeable batteries, make no difference. Powers on quick enough, but can never get the red light indicating it charged and ready. Pilot light doesn't fire it eitiher. Looks like I get to try out the warranty feature now.
c2thew
12th of September 2011 (Mon), 18:01
"Powers on quick enough, but can never get the red light indicating it charged and ready. Pilot light doesn't fire it eitiher. "

dead capacitor. told you youngnuo had problems with their electronic circuitry. this same problem happened to me except with a youngnuo 460 II. they're build quality is up to par, but the circuitry is what keeps them from rising up further.