Question about magicJack Two, 2 Magic Jack Plus Voip Phone With Or Without Computer In Box
This is a common problem with the magicjack. It works when plugged into a USB port on the computer, but not when plugged into an AC wall socket. On the magicjack plus there is a blue power light near the word "plus". If that light is not on, then it is not getting power.
The problem is in the seperate magicjack power supply module.
When the magicjack is plugged into your computer USB port, it is getting power directly from the 5 volt source in the USB port.
In order to use AC wall current to power the magicjack, a power converter module is needed. That module contains a transformer and rectifier that coverts 115V AC into 5V DC. It is that power converter module that is failing.
The power converter module has an AC plug on one end and a USB socket on the other end. In order to power the magicjack from the AC current from the wall outlet, you plug the power adapter into the wall socket and the magicjack into the USB socket on the power supply module.
I had the same problem with my magicjack. I measured the 5V output of the power module to be only 3.5V. I took the power module apart to figure out why it failed. I found two 220uF 10V capacitors that were labelled "Low ESR" (C8 and C9). I measured the ESR of these caps and C8 was 1.5 Ohms. I replaced that cap and it fixed the problems. These two caps are circled in red in the photo.
I do not recommend repairing these power modules. I did it out of curiosity. These modules are very cheap. There are lots of AC to USB power converter modules available on Ebay for only a few dollars. Search Ebay for magicjack power adapter.
Posted on Dec 25, 2014
Your actual MagicJack is causing the adapters to short out, prob. drawing too much current from the wall outlet, that is why your not having the problem when it is hooked up to your computer...cause its regulated there.
Posted on Dec 03, 2014
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