Bro 1-2 Months Bhi WithOut Fan Box Chalta Rhe 2 Problem Nahin.
Mera Suggestion Permanent Solution Point Out Pe Mabni Hai.
Kuch Receivers Excessive Heat Create Kerte Hain Then People Also Use An Additional Fan Just OutSide The Box Body.
Usb Laptop cooler are easily available. Get a fan which can fit on top of dm.
My dm800 fan stopped working also.
Now I am using laptop cooler on top of it and its cool like a cucumber.