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Old 08-22-2008, 11:39 PM   #1 (permalink)
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Mpguino acting weird

Ok, so I had the mpguino working the other day straight wiring everything together, so today I put all the components on board to rewire it.

Now it doesn't work

1. Would putting the led in wrong cause this (doubtful, I shorted it to test it anyway)

2. Has anyone seen there screen do this before
After turning it on, the screen stays blank for a couple of seconds, then the top row of characters displays all 16 boxes, then I can see that the screen is updating really fast but not showing anything.

3. Did I burn something out during my soldering? (I don't think I did)

What could have shorted to make this happen?

I'm going to check over my component board and wiring again, but I was wondering if anyone has had this happen before

Sorry, yeah I going to recheck my wiring right now, but I want to get some other opinions in case everything still looks right.

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Old 08-23-2008, 01:01 AM   #2 (permalink)
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I ran into this today actually. In my case I had the RS and Enable lines crossed. Triple check your LCD -> 'duino connections: RS, Enable, and Contrast are close to each other on both, but are in different orders. I found it easier on my board to fix it in software

Oh, and even if the LCD is wired wrong or not even powered, the 'duino's LED(s) should light up if its powered.

Good luck.
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Old 08-23-2008, 10:07 AM   #3 (permalink)
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Yeah, might have some wires crossed. Or else try reflashing the guino.

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