My husband broke a little plastic tab thing off the power switch on the motherboard of my daughter's PE, so we ended up taking the motherboard and cable from the 1st PE and putting them in her PE. We also had to switch the batteries, but we now have a working PE out of the 2!!!
There was definitely a short in the cable. All the wires under the tape are bare, and one copper wire crossed over 2-3 other copper ones and this is where it appears the short originated. I will try to post a pic later - busy right now with family things. . .