No sound through HDMI (desktop win10)

[Abby244]

I am using MSI H110M PRO VH motherboard with i5 6500 (but no graphic card except the inbuilt intel hd 530).
My problem is that NO SOUND COMES THROUGH HDMI, as it doesn't show my LED TV (or Digital Audio HDMI) in play back devices and I have been using it like that for past 3 years
Things I have tried:
-Uninstalling , reinstalling and updating intelHD and realtek hd audio drivers , manually and as well as through windows auto update feature.
-Formating whole system and reinstalling windows 10.
-swapping cables etc etc.
All to vein, nothing worked.
LED TV works perfectly with other hdmi inputs such as tata sky setup box.
Though sound comes through aux output from CPU but not through hdmi.
Can you please help me solve this problem ?