Hey Guys,

Thanks for the tips, still can't get it to power on. Here is where we are at...

1. Have left the powerpack charging for 7 hours straight. Green and Red Light stay on.
2. Have tried plugging and unplugging AC Adapter.
3. Tried shorter charges of 1-2 hours
4. Have tried multiple outlets in my home
5. Have used a pin to click the reset on the EV4.
6. Tried wearing my lucky socks and kissing a leprechaun

Still no luck. Flick the power on, no light, no sounds.

I then opened the powerpack to make sure a cable had not come lose in shipping, see attached photo. All looks fine.

Once upon a time had a voltmeter...for the life of me can't find it now. If I can get my hands on one, will test to see if any power in the battery.

Unless anyone has other ideas, I am thinking I have either... A. A Bad Battery B. A Bad EV4 Controller pack

Thanks, Dan

What do the lights on the charge do when you unplug the battery? Do the green and red leds remain on? Yep, next step is a voltmeter to test the battery.....

Hey Richard R,

When I plug the balance charger into the wall, the red light goes on. When I hook up the battery pack, the red and green light go on...and stay on forever. If I disconnect the battery pack, the green light goes off and red light stays on.

The fact that the green light goes on has me believing some connection is being made to the battery pack - right?

Will try to dig up a voltmeter

Thanks.

Have you turned the ezb on yet?

Maybe the battery was fully charged and it just needs to charge a battery first to learn? The micros in those things are pretty smart - but again, we haven't had a report of a damaged charger yet. And we have been using them for over a year.

There's always the chance of a manufacture defect in your case. Would you like a replacement? If so, quite the URL to this thread and contact us.

Hey DJ,

Sorry not sure I understand this...

"Have you turned the ezb on yet?"

This is what I am trying to do. Have the EZ-B4 plugged into the power pack, flip the power switch and nothing happens.

Would love to get it working, but at this point not sure what needs to be replaced. Seems it could be -

1. AC Adapter
2. Balance Charger
3. Power Pack (chest of my humanoid)
4. EZ-B4 Controller.

1 and 2 seem unlikely as lights on balance charger go on. To me toss up between 3 and 4. So what would you replace...or do you just replace the whole thing?

Thanks!

Do you have a generic 7 - 16v power supply from something else lying around the house? If it has the same barrel end plug and the centre pin is positive then you can use it to at least test the ezb4... Also check the 20amp main fuse in the ezb to see if it isn't blown....

Ok, I don't see a barrel jack socket on your JD, so the generic power supply idea probably won't work... Find a way to test the battery and see if the fuse isn't blown....

Hi,

Did buy a voltmeter. Power out of Balance Charger is 8.4 volts - so charger seems to be working.

Testing power on EVB4 and nothing. Then opened power pack, disconnected the battery and tested the power coming off the battery directly - nothing. So, seems like battery is defective. I guess could be some scenario where the charger is bad, but since it is putting out 8.4 volts, I guess it is working.

At this point would seem like the best course of action is to contact support and get a replacement. Bummed the robot is not working, was very excited when I got the box...but looks like I will have to wait longer.

One other piece of info in case anyone else has this problem. A really weird smell when I opened the box. Can't describe it...just weird. Maybe that was the sign that the battery had gone bad?

Thanks for the input and ideas.