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Basic Electronics » Black Display on LCD

March 27, 2011
by Druidman
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I initially set up the kit as per the first build. It worked fine and gave me the correct display. I shifted the LCD which apparently shifted the wiring, possibly creating a random short between wires. The LCD now displays only black rectangles. Is this an LCD issue or was the program corrupted??

March 27, 2011
by Ralphxyz
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Shut off all power, remove the USB wires move the run/program switch to program.

What happens? I had the black rectangles you do mean you are getting them on line 1, 2, 3, and 4 correct not just lines 1 and 3.

I can not remember the cause or specific solution/resolution.

Black bars on lines 1 and 3 in run mode usually mean the program got zapped.

Redo your LCD wiring, in fact take a close look at all of your wiring but specifically rewire your LCD.

Ralph

March 27, 2011
by Druidman
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I had not gotten to the wiring of the USB yet. Lines 1, 2, 3 ,4 are all black rectangles. I think you may be right about the program getting zapped. I think I may have to reload the program so I will have to jump to that task to move ahead. Any suggestions on that?

March 27, 2011
by missle3944
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Hi Druidman,

I remember I had this issue about 3 months ago. I remember I fixed it by either rewiring the LCD or I replaced the battery by running off of USB power. If you rewire your LCD or your board make sure you have a good 1/8th inch or 1/4 inch of wire going into the lcd to get a proper connection. I remember I had some issues with it because I did not have a proper pair of wire strippers.

missle3944

March 28, 2011
by Ralphxyz
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Do you get just two black bars in program mode (switch up to the left)?

If not then there has to something about your wiring.

Ralph

March 28, 2011
by Druidman
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I redid my wiring again and found that I had essentially bypassed the 5V regulator when I tried to simplify my wiring.The kit is now displaying the opening message correctly. Thanks for the support.

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