I am having problem with connecting my TF to TV or my lap top through HDMI port? when I connect it to my TV first time, I saw sign HDMI connection on TF next to time ,suddenly screen started flickering, so I discinnect it. since then i do not see the sign of HDMI connection on TF and Also, I can not connect it to TV or tablet? I changed the cable, use connector,... still not working? so How I can check the HDMI port works or not?