Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => iMX233 => Topic started by: microuser on January 22, 2014, 01:53:56 PM

Title: new nano won't power up
Post by: microuser on January 22, 2014, 01:53:56 PM
Hi!

I've purchased a nano, and soldered on some header strips so I can power and connect through breadboard. After connecting up a 5v supply, the LED doesn't come on and I can't get anything out of the serial port.

Measuring the voltage across pins 1-2, i get 4.86V, which I'm not sure is correct. Testing the UEXT pins 1-2, I get the expected 3.3V.

Please can somebody help me troubleshoot this problem? I'm not sure what to try next :(
Title: Re: new nano won't power up
Post by: f2zubac on January 23, 2014, 12:23:16 AM
Hello

1. Make sure Vcc +5 -> Pin 1/Con2 and GND -> Pin 2/Con2
2. Don't connect any external devices yet (USB,UEXT,etc.)
2. Capture minicom logs while attempting powering it up and send it over

Sincerely

Dragan Zubac
Title: Re: new nano won't power up
Post by: microuser on January 25, 2014, 11:48:55 PM
thanks for the reply f2zubac

The powering up thing was a non-issue. I assumed that the led was a power led. After I RTFM I realized that that wasn't the case and I wasn't seeing anything because I had no card inserted. dd'ing an image I found online and inserting the card I finally got something in minicom.

That's where the good news ends though.. All I can see is garbage. I've checked and I'm pretty sure that all my serial settings are what uboot expects (115200 8N1)

Any advice on what to check next?