Power Question.... AC and Onboard. topic

Long story, but had all my wiring done for the eMMC mod, plugged it all in - and my dog ran over the cables and I thought it was all good, but after that I couldn't get the eMMC to read - decided to make sure it was still good and shorted the resistor pads - but it wont power up now. I know the pad it good, but heres my question -

I'm worried something shorted with my dog incident - The wall Adapter is 16Watts, but when I meter mine its 6v - Is that common??

Next question, is there a good spot on the board to see if I am getting good power?

Thanks....