Please help, corrupt display (MX224)

Synapse · Post by **Synapse** » Tue Jul 20, 2004 4:14 pm

No matter what I do, the display shows gibberish characters. I have tried to install the drivers again, updated to the latest version of LCDC, etc. No luck.

This display worked great for almost a year. Now the display is very dim and displays weird characters. When I unplug it from the USB connection and plug it back in, I don't even get the default 'Matrix Orbital' display text, just junk. You see each 'cell' of the display light up for a fraction of a second and then it dims and shows junk.

Any help or ideas about what I can do would be great.

The following shows in my device manager:

Ports (COM & LPT): Matrix Orbital MX2xx USB Driver (COM3)

Universal Serial Bus controllers: Matrix Orbital MX2xx USB Driver

Driver Info
Date: 2/1/2002
Version: 1.0.2101.0

Tom · Post by **Tom** » Tue Jul 20, 2004 4:22 pm

What revision of PCB do you currently have?

Synapse · Post by **Synapse** » Tue Jul 20, 2004 4:26 pm

I'm sorry, PCB?

Tom wrote:What revision of PCB do you currently have?

Tom · Post by **Tom** » Tue Jul 20, 2004 4:30 pm

There is a number on the backside of your LCD display. It's the side that shows all most of the electronic components. There is a Revision number shown on there. An example is Rev 1.4 . Can you please tell me what the revision number?

Synapse · Post by **Synapse** » Tue Jul 20, 2004 4:35 pm

Sorry, had to pull it out:

REV 1.0

Tom wrote:There is a number on the backside of your LCD display. It's the side that shows all most of the electronic components. There is a Revision number shown on there. An example is Rev 1.4 . Can you please tell me what the revision number?

Tom · Post by **Tom** » Tue Jul 20, 2004 4:42 pm

Can you try the following instructions?

1)Unpower your display
2)Place a jumper on pin 6 and 7
3)Power up your display again
4)The Baud will be set at a default 19200

Refer to the link, which is the manual, below. The instructions are on page 7 of the pdf file.

http://www.matrixorbital.com/manuals/LK ... USB_01.pdf

Synapse · Post by **Synapse** » Tue Jul 20, 2004 4:54 pm

looking for an extra jumper ...be right with you...

Tom wrote:Can you try the following instructions?

1)Unpower your display
2)Place a jumper on pin 6 and 7
3)Power up your display again
4)The Baud will be set at a default 19200

Refer to the link, which is the manual, below. The instructions are on page 7 of the pdf file.

http://www.matrixorbital.com/manuals/LK ... USB_01.pdf

Synapse · Post by **Synapse** » Tue Jul 20, 2004 4:58 pm

Ok...I have set a jumper on pin 6 and 7 and things look the same so far.

Synapse wrote:looking for an extra jumper ...be right with you...

Tom wrote:Can you try the following instructions?

1)Unpower your display
2)Place a jumper on pin 6 and 7
3)Power up your display again
4)The Baud will be set at a default 19200

Refer to the link, which is the manual, below. The instructions are on page 7 of the pdf file.

http://www.matrixorbital.com/manuals/LK ... USB_01.pdf

Synapse · Post by **Synapse** » Tue Jul 20, 2004 5:09 pm

FYI...I can enter characters and they show on the screen through HyperTerminal.

Tom wrote:Can you try the following instructions?

1)Unpower your display
2)Place a jumper on pin 6 and 7
3)Power up your display again
4)The Baud will be set at a default 19200

Refer to the link, which is the manual, below. The instructions are on page 7 of the pdf file.

http://www.matrixorbital.com/manuals/LK ... USB_01.pdf

Synapse · Post by **Synapse** » Tue Jul 20, 2004 5:34 pm

Ok...I did some tests...and downloaded the Matrix Orbital LCD Tester.

Things seem to be working now...not sure exactly what I did...but I did a few things with the Tester, including changing contrast etc...disconnected with the Tester and turned LCDC back on...now it is working.

Tom · Post by **Tom** » Tue Jul 20, 2004 7:11 pm

Glad to hear it works now. If you have any problems again let me know.