The idle handset will display NO LINE if it does not detect a live telephone line. Check the telephone line connection both at the phone jack and the base. Tip 2 of 5. You may have a defective telephone cord. Try replacing cord between the jack and telephone base. Tip 3 of 5. Inspect Phone Line. Next, examine the phone line. Unplug the phone line from the wall jack. Plug it into another phone. Does the other phone get a dial tone? If not, the issue might be with the line or service. If the other phone works, the problem is with your Vtech phone. Try using a different phone line. Sometimes, the phone line itself can.

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Experiencing no dial tone on your Vtech cordless phone can be frustrating. Fortunately, there are some troubleshooting steps you can take. Let's explore what to do if you find yourself in this situation.. By checking connections and inspecting the phone line, you can often resolve the no dial tone issue on your Vtech cordless phone.. Without power, your cordless phone won't work even if the phone line is fine. Test with Another Phone If you have a regular (non-cordless) phone, try plugging it into the same wall jack. If it works, then your VTech phone might have a problem. If it doesn't work, the issue might be with your phone line or jack.