Parallel LCD works Sometimes

Forum 2005-2010 (read only) Hardware Troubleshooting
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I am working on my project, and it includes a LCD Display, I do believe it is a parallel LCD. At first when I turned on the "machine" nothing would happen, but once I added some lights and sound, I notice everything works all the time, but the display only works some of the times. Its very annoying, because it is enclosed in a box, and I have to take it out to hit the reset button on the board, if I want it to work immediately. Or I could just keep turning it off and on. I have also notice when it turns on the top line lights up, then it disappears, once this happens it either works, or its time to turn it on and off, or hit the reset button.

I was wondering if anyone knew how to fix this. I have also tried hooking up the RX to GND with a 10K resistor, and I have tried RX to the TX, and nothing works.

Any Ideas? I could post a video if I did not explain this enough.

Thanks Guys! :wink:

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No ideas, at all?

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Lamez:

Since you mention TX and RX it looks like you might have a parallel lCD (as most of them are) connected to the microcontroller using one of the serial interface boards that are available.

You mention that the top line lights up, then disappears, which indicates that the LCD is connected and getting power but it is not being initialized properly. If you are using a serial interface board then the initialization is being done by the microcontroller on that board and you need to look at it's documentation.

We need more information about your project and it's setup in order to help you.

floresta

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I will look up the docs to the display later, here is more on my project

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