Asus — Strong heating issue at camera side, which service center guys can't solved after repairing.

Address: Mumbai City, Maharashtra

My 1 zenfone 5 (purchased before 4 months) get starts heat strongly after 2 min. using.. (without no any background processes/apps, without any net connection, without any auto -updates) i also visited ASUS center before 15 days they chaned the main board. But Nowdays it also showing same problem, n also starts heating from display side. charger plugin light was not shown. it was also repaired that time. But before 2 days it doesnot showing when charging.. I'm having 2 Zenfone 5 & 1 zenfone 4 mobiles. we observed the heating issue at back side in all 3 mobiles. So. How more time i do visit to such a ASUS Service Center. Too bad Servise.. Regards, Kale A.D [protected]