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Resolved Resolved by Jeremie!

Ezb V4 Wifi Controller Failed Again. This Is My Second Ezb That Has Failed. An

Back in Dec, 1024 I received an EZB that worked for about 4 hours, then it stopped talking on boot up and would not connect to Wifi.

I just bought another one and it has done the same thing? This is very frustrating, not only does it cost me 20.00 to ship back, it stops my projects. *confused* *stress*

Has anyone else had this issue?


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Merne, if I may offer build advice. As with any custom project I suggest to well document everything you do , take picture of everything and document and follow your wiring plans , aka "schematic". If you do so we can often find potential problems before you even power your ezb on for the first time.

Check and double check and document everything. The more we know about your project as you go , the more helpful we can be. Waiting till there is a problem requires us to ask probing questions and reconstruct what may have happened in reverse. I have done tech support for 8 years and what I find is 90 percent of the time a customer makes a small error setting up they don't realize it up until after the point of trouble shooting.
It is a tough lesson to learn but
1. Documentation as you build
2. Pictures of every change
3. Wiring schematics before you make your first connection will help you figure things out on paper and save your ezb's life!
Not to get the ass here, I do document and take pictures of every thing I do.
Using my ezb for 4 hours checking each servo before I do the final fit and connecting the servo(s) then power up the board each time the same way, I guess I am just dumb and don't know what I am doing. I my not know scripting as good as most on this board. I know when I make an error and will admit to that error.

I did not overload, connect it wrong, backwards,ect!

Thanks for the tips to an idiot!
I don't think anyone is calling you an idiot. It can be frustrating to get advice that does not remedy the issue but on the bright side it narrows down what the issue is and is not.

At this point does the unit power on with nothing connected and try to connect (plays the chimes)? Have you attempted to reset the unit and connect in ap mode?
Hi @merne,

I was wondering if you could check 2 things:

1. Please check the servo you were using for testing maybe with a servo tester or something equivalent to see is the servo itself might be causing the issues.

2. Please try replacing your green and black 2.1mm barrel plug, if you are in a high current situation (over 6 servos) those connectors cannot handle the current and can brownout your circuit.
@merne... For sure you're not an idiot... You have already built one awesome inMoov... If anyone can help you diagnose this Jeremie can. I know this sucks, but like all things you'll get this worked out dude....

What plans do you have for the second inMoov? Anything special build wise?:)
@Merne , I apologize , I assure you I did not mean my planning / documentation advice to imply anything negative. It is just a " best practice" that could help. If you did document and make schematics then seeing them may help us get to your resolution quicker.
I noticed something different about that battery , is it a 6 volt SLA?

If the battery is only 6 volts it may be dropping below the "low voltage" threshold and browning out , even with a small load.
Merne I feel your pain! Mine just let the Magic smoke out on Friday. It was kinda funny to see smoke coming out of his head. I won't even bother sending mine in due to a couple modifications ie amplifier mod and removing deans power connector and replacing with wire that I made. And yes the unit ran for a couple months after the mods so nothing was done "wrong". I was actually using the robot when it happened , moving around the house. No telltale signs of what burnt on the bottom board but you sure can smell it. Is it possible to order just the bottom half of the ezb4? Either way I will be ordering another one and modify it again. Good luck !
@Josh (good point about the battery)... The SLA could be low... Occam's Razor rules sometimes...
@kamaro, start your own thread , post pics. Also unscrew the four screws from the bottom of the base and it will split apart. There is a small circuit board with a fuse and dean's connection. Remove the ezb.... Check the fuse first with a meter on the continuity setting.
Josh apparently you didn't read my post. Thanks but not asking for assistance, just relaying my experience
Ok bottom half as in the ezb itself not the power base , sorry

I tested the same battery and servo on my other ezb 4 and my ezb 3 and everything works.

I get no red light and no chime on the ezb 4.

Hello, I will try to explian.  When this happened ro rma my new one just two days ago iI was opening a servo take out the pot put the servo togther coonnect. That servo to the ezb  plug the battery in on the ezb then test the servo to set the pot.  Disconnect power to the ezb then disconnect the servo.   
fix my servo in my part of my robot amd start again with a new servo.  Dd the same proecc over to test the servo on the robot.  I never had more then one servo connected to the ezb.  So unpluging and repowering the ezb over 4 hours.

Again I do not need a diagram to test a servo with the pot out and only one servo is connect to the ezb.

At this point I am opening a warranty.


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@jeremin, my phone changed you name, last message is for you
Hi @merne

No red light and no chime means that unfortunately the ARM chip on the ez-bv4 main board is damaged. These are the same symptoms as the previous board from you that we have examined here at ezrobot HQ. @Aislinn should be able to give you some resolution tomorrow via a direct email.
@Josh, hey sorry for getting this late reply. I apologize for my hot headedness. I know you might well and you are right about documentation.

all of you guys and gals are always helpful on this board. I just took it personal and shouldn't have.
Have to say jeremie because it was the ARM.
Ha, ha... @Merne things could be worse my friend... you could be having the problems Nomad is having again.... That boy is just one big lab accident... :D We love you nomad....:)

PS... And there is no need to apologise we understand your frustration...

that boy?am 51 years old......
your explanations and using words can much better. :)