Ok. Now I've got a brand new display. Ive solder a header on it, then made the right connections. Anyway the LCD's backlight wont light up.
And yes I have tried from the beginning with resistors. I've started on 680 ohm resistor and then went down to a 560,470,390,330,270,180,150 and now a 100 ohm, still this stupid backlight wont show up.
Here's a pic with little more Christmasfeeling..
Now when I thougt of it.. When I had my old display and the wrong connections the backlight went up at least.
Like here: https://vimeo.com/54704282
Something is very mysterious with this special lcd.
Seems like the LCD from usa on ebay is much more easy than this model.
http://www.ebay.com/itm/1pcs-1602-16x2-HD44780-Character-LCD-Display-Module-LCM-blue-blacklight-New-/281040213404?pt=LH_DefaultDomain_0&hash=item416f4d559c