I have been having the raspberry pi zero since launch (I bought it with the magazine when it came out) and finally I bought the necessary cables for it to plug it in a TV via the HDMI port. The cables, SD card and adapters I bought from eBay and one thing I did not buy is the power supply, for that I used my phones power supply which output is 5V 2100 mA. When I tested the Zero it did not boot at all, I have tried reinstalling NOOBS on the SD card even tried Jessie no luck whats so ever. I have tested the zero if it is dead or not by connecting its USB OTG port with a computer and the computer did recognised the device - I think that means it is not dead at least. Any ideas what cloud be the reason that it is not booting? Thanks!
Your raspberry isn't outputting anything, but it works. This can be a power issue. Different monitors/tvs require different power inputs (many devices have current injectors), that means that your tv may not recognize your raspberry but other device can. Perhaps a more common issue is the cable, I've ran into this issue myself. All comes down to the quality of the cable, most of the cheap cables suffer from signal loss. What I mean by cheap is like a $1 cable from ebay vs a $3/4 cable from a store. If you bought your cable on ebay, and you choose the cheapest one, this can be the problem. This is very simple to verify, just try connecting your raspberry to different devices and using different cables. If you don't get any output at all, probably it's something else.