My phone has no dial tone, display has "no line" ?

SOURCE: Phone line/phone jack problem

The wiring on the jacks is set up for a 2 line phone.

If you take the jacks apart, you will see either:
A) red, green, and black, yellow
B)white blue/blue white and white orange/orange white

You need to swap the pairs.
If there are red/green/black/yellow wires. remove the yellow/black and move them to where the red/greens are. Then put the red/green wires, where the yellow/black used to be.

OR, you need to swap the orange and the blue wires.

SOURCE: display blank, no keypad tones, Emerson EMG900 phone

you must use a ac adapter which the phone doesnt come with or 3 double A batteries

SOURCE: I pick the phone up, no dial tone. Display says

We called the phone company.....There was a problem up on the telephone pole. They fixed it, no charge.

SOURCE: no dial tone and "line in use " message

Try the simple things first. Try a different phone. In my case, I had the phone company check - outside was fine. After two hours my phone worked. I figured out what happened in my case. Both phones were dead (battery). I think one died with the phone off the hook. once the phones were fully charged, the phone worked.

SOURCE: My phone says line in use and no dial tone

I also, but my dsl is still functional...