LCD4041 Backlight question

aronmartin · Post by **aronmartin** » Sun Jan 08, 2006 10:31 pm

I have a LCD4041 / LK404-AT REV 1.10 I have been using it for a quite a while powering through the 4 pin connector. Recently I decided I wanted to only use one cable so I made up a modified serial cable for it. I soldered the point by the serial connector for powering it through there. The display powers up and works fine, but no backlight. Is there another place I need to solder or unsolder? I see 2 points labeled that could possibly be something, they are labeled "LC5" and "LC12". The backlight still works if I power it through the 4 pin connector. Thanks in advance.

Tom · Post by **Tom** » Mon Jan 09, 2006 1:23 pm

I will take a look at the board, then I 'll get back to you about this.

Best Regards,

aronmartin · Post by **aronmartin** » Mon Jan 09, 2006 2:31 pm

Tom wrote:I will take a look at the board, then I 'll get back to you about this.

Best Regards,

Thanks, Maybe this is easier..

That's a photo of my lcd.

Tom · Post by **Tom** » Tue Jan 10, 2006 3:54 pm

Hi aronmartin,

Sorry for the delay, I had to fish look for a display, since it's so old. Try desoldering LC5 and soldering LC12 for the backlight to turn on when power via the DB-9 connector.

If you have anymore questions or concerns, please feel free to post them.

Best Regards,

aronmartin · Post by **aronmartin** » Tue Jan 10, 2006 6:23 pm

Thanks Tom that did it!