prob (white screen) with datalux m1023 and sharp lcd

Question · 07-02-2003, 11:21 PM

Ok guys, tried searching my brains out, but no luck... I think the answer is "the lcd is dead".

Here's the question: I have a datalux m1023 rev f. controller and a Sharp LQ104V1DG11 screen. In August, I hooked up everything, worked fine, had some lines going through, but I figured that was because I used an unshielded monitor cable to go to the controller. I disconnected it and put it aside until about a week or two ago when I tested it to make sure it was working...and lo and behold, it isn't.

Details:
1) All I get is a white screen. (so the inverter is working).
2) I can make the screen brighter or dimmer, so that part of the controller works.
3) I checked the pinouts from the cable going from the video card to the controller (about 4 times), and it's all correct (and it worked before, so that shouldn't be the problem).
4) I checked the continuity on every pin of this cable (three times...ugh).
5) Checked continuity on half of the 31-pin hirose cable (those are such a pain....I don't think this cable is the problem as I didn't solder it..had it made somewhere else, pretty sturdy..)
6) Checked to make sure the two 5 volt pins were indeed supplying 5 v...which they are...
7) Plugged in a controller for the LQ10D421 which has the same pinouts as the lq10v1dg11 (man that's a pain to type) that has its own hirose cable...still no picture.

GAH! So I figure it's either the hirose connection itself on the lcd (which looks fine to my eyes) or some other electrical problem with the screen that must've occured while in storage..

So...I'm going crazy over this, any ideas?

MikeHunt79 · 07-03-2003, 07:29 AM

Hmm, is your computer giving out a good signal?

I remember there being an issue with some VGA cards and datalux's.

EDIT: Try it out on a another computer if possible.

Question · 07-03-2003, 12:40 PM

Oh yeah, forgot to mention that when I tried hooking up the second controller, I hooked it up to another computer and another video card using both the second controller and the datalux controller. I tried the video out off of the second controller (which is really a video card with a chips t65550 controller on it), my ATI All-in-Wonder Pro (which is what I tested it sucessfully on in August), and in my home tower my Voodoo 3, and my Nvidia Riva TNT2.

Thanks for the input...I'll try it one more time on the second computer just to make sure, though.

SuperMatty · 07-03-2003, 12:51 PM

I ran this same setup for awhile. The LQ104V1DG11 will display a white screen when it isn't receiving a video signal. This may be dumb, but did you try hooking the machine up to a regular monitor?

Moose · 07-03-2003, 02:27 PM

Also are you sure that the video signal is running at a supported resolution/refresh rate. My lcd just shows the white backlite when the signal isn't supported and garbage at only one of the wrong resolutions.

Question · 07-03-2003, 03:22 PM

Yeah, I have dual monitors running on my home tower, and I know these work...I set all these to varying resolutions all at 640x480...60hz 256 colors, 60hz 16bit,60 hz 32bit, 75hz 256-32bit....and even with these resolutions, it should show the booting screen (which is independent of the OS's refresh rate...right?) ...and in August when it did work, when I set it to refresh rates it couldn't deal with (if I remember right), it would at least show scattered lines...but maybe that was just when I tried 800x600.

When I tried it on the other computer, I hooked up a monitor to both video cards to make sure they were both sending out a signal, and they both were.

Thank you guys for your suggestions and help.

Question · 07-11-2003, 07:02 PM

So I assume from the lack of replies, that I should just give up. Any thoughts? Anyone?

osirisdon · 07-11-2003, 07:32 PM

it happened to me when the controller was not properly seated into the screen or are you running a cable from the controller to the LCD? if so make sure all them 31 pins are making a good contact.