double check the wiring to the barrel adapter. also, do you have any servos connected?

No servos at all and I've checked the barrel (even re-wired a couple of times). I've now discovered if I hold the unit by the heat sinks the blue and red lights will activate but the moment I take the pressure off it goes dark.

Your EZ-B is suffering from cold solder joints on the two heat sinks and FETs. Use a dab of solder flux on the connections and apply heat from the tip of a soldering iron to re-flow the solder on each connection.

Hey Mulberry,

Robot-Doc might be onto something

We need the solder to reach a certain temp so that it can properly bond the two surfaces together. Usually, not always, you can see a cold solder joint because it tends to look "duller" or pale in comparison to a regular solder joint which tends to be shiny.

Let us know what you find!

The repairs suggested by Robot-Doc did not work. I'm at a loss as to what to do.

I'm having the same problem. I just opened my box today, also. No power.

Hmmm. I was told I could return if for repairs but have to cover the cost if they can't replicate the problem. I honestly can't chance doing any more work on it myself because of the investment so far. I was tempted to replace the fuse but couldn't pull the current one out. It seemed wedged pretty tight.

Scratch that....I don't have that problem. My kids had swapped out batteries from a new battery package. Instead of throwing the old batteries away, they just put their dead batteries in the package.

:D