Re: [Gumstix-users] LCD Problems Again

[Marc H. <mhu...@lo...>]

 

I received two similar setups a few weeks back and had not issues - besides
needing to update the firmware. Sounds like something's shorting out. Have
you tried just powering the console-vx by itself. If that's fine (led comes
on and stays on) try in turn to do console/LCD and Console/Verdex to try
localize the issue. For those who get alarmed when after a few minutes the
LCD goes black - rest assured it just going into sleep mode. If you have a
USB keyboard plugged in, hitting any key will brighten your day :-).

 

Given your on going struggles you've probabIy check this a million times,
but to cover all the bases and for others with a same setup, make sure you
have the flex from the LCD connected correctly? Sorry but the listserver
didn't accept the photo attachment.  There are numbers silkscreened onto the
flex as well as the console connector X2 indicating the Pin 1 location on
both. The flex cable slides in above the black clip of the connector with
conductive fingers on the flex facing up and there should be no exposed
copper visible on the figures if mated correctly. The natural location for
the console-vx is to lay on the back of the LCD component side up, square
with the top right corner when looking from the backside of the LCD. Three
connectors lining up in the middle along top side. MAKE SURE TO INSULATE THE
BACK OF THE CONSOLE-VX FROM THE BACK OF THE LCD.

 

Marc

 

 

 

  _____  

From: gum...@li...
[mailto:gum...@li...] On Behalf Of
Christopher Gilbert
Sent: Monday, October 22, 2007 10:23 PM
To: General mailing list for gumstix users.
Subject: [Gumstix-users] LCD Problems Again

 

I am still having trouble with getting my Samsung LCD to work.
Here's the situation as hit has unfolded for me:

1.	I ordered the ConsoleLCD-VX, and the Samsung LCD to accompany my
Verdex XL6P.
2.	When the two arrived, the pair would not work. I noticed that the
console board was becoming very hot by the power supply. 
3.	The LED on the board was not lighting up, so I posted to the message
board the next day and ended up RMAing the console board.
4.	When I received the replacement console board, I still was unable to
get the LCD to work. This time, the board would light up momentarily, and
then immediately die out. This all took less than a second. 
5.	I posted to the board again, and was drawn to the conclusion that
the 4V power supply was not able to supply enough power to get the LCD
turned on.
6.	I ordered the 5V power supply from the site.
7.	When the power supply arrived, I set up the boards again. The first
time I plugged the power supply in, I had the same problem: the LCD and LED
lit up momentarily, but went out almost immediately after.
8.	I unplugged the power supply, and plugged it in again. This time, no
lights came on, and after a few seconds, the console board became quite hot
beside where the power supply plugs in. 

I am starting to worry that the original problem with the board and LCD
actually was the LCD, as the same problem has happened with two console
boards. Or are there known problems with the console boards burning up? I am
really not sure how to proceed. If anyone has advice, I would be very
grateful. 

Thanks,
Christopher

-- 
Christopher Gilbert
B.S., Computer Science
University of Maine 2006
http://motomastyle.com