Hardware XBOX 360 green lights but no image or audio

[Sr. G]

my xbox do not show image or video but it show me the normal green lights.
it is hacked (it has a chip, do not ask me more, it comes from the store like this and i do not know ver. of the chip or how it works, only know it can play copies) but it was working until one day i want play i turn on but it do not show me nothing.

i bring it to a technical but he said to me "i have to apply a heat process but it can or can not work, you have to pay anyway *insert her the half of my salary*" so i want to be sure what it coul be

 

[DinohScene]

Try and boot it via the eject button.
If nothing comes up, swap out the HDMI cable or try it with the AV or a different AV cable.
Is nothing still, I hate to break it to you but I got bad news then.

 

[Sr. G]

Try and boot it via the eject button.
If nothing comes up, swap out the HDMI cable or try it with the AV or a different AV cable.
Is nothing still, I hate to break it to you but I got bad news then.

but, if this does not work, what could be the problem¿, i send it to the technical because i wanted to sell it, but if it can be solve then i am going to sell it for spare parts.
i am going to do what you said, my first thought was the cable but i never try with another one because do not know anyone with a xbox :/

 

[DinohScene]

HDMI cables are extremely cheap, Xbox AV cables however are proprietary and can only accept other 360 AV cables.