I have a customer on the phone who has a olevia flat screen and can not locate an input for his cable wire. where are they located?

Here are the only signal inputs located at the back of the tv.
1 x HDMI input ( 19 pin HDMI Type A )
2 x component video input ( RCA phono x 3 )
1 x VGA input ( 15 pin HD D-Sub (HD-15) )
Audio line-in ( RCA phono x 2 )
2 x S-Video input ( 4 pin mini-DIN )
2 x composite video/audio input ( RCA phono x 3 )
1 x headphones ( mini-phone stereo 3.5 mm )
1 x SPDIF output ( TOS Link )
1 x audio line-out ( RCA phono x 2 )
1 x subwoofer output ( RCA phono )
1 x serial

If you are looking for a coaxial cable input.. it is actually not available so you have to connect a converter from coax cable to RCA cable for you to connect it on your tv.