CDI shows black screen when turned on

[Atari 5200]

I got the following message from someone I sold a CDI to. It worked just fine before I shipped it, but he's having problems getting it to work. Here is the message. Any suggestions?



Well...

I hooked up the system fine, and the tv is at the right channel, and everything.

First time I tried, it appeared on the screen but with no sound. So i turn it off and try again. I've tried about 100 more times and now the screen only goes black, i dont understand the problem.

See... with or without a disk, the systems menu should still be coming on. But it isnt... its just black. I'm just trying to figure out why.

[raylydiard]

could be a scart lead i bourght a cheap crap one just showed black screen or could be caps