dx 1900 does not come on.. can it be repaired?

I am not familiar with this iron but the general case is that irons are not made to be repairable these days - to get to the insides you have to destroy the iron - it's a safety thing - the manufacturers don't want you messing with the internal works lest you electrocute yourself and your surviving relatives then bring a case for compensation.

I suspect the answer to your question is No.

On Amazon this Rowenta iron gets 13 Five Star reviews and 36 One Star.

Good luck...

Peccavi
May 2013