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Thread: what can i do about my 669?!?!?!

  1. #1
    MySQL Error soundman98's Avatar
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    what can i do about my 669?!?!?!

    my lilliput 669 is quickly making it's way to a shooting range..


    the whole story:
    about 3-4 months ago, chris(mo-co-so) offered a 'mistake' screen for cheap. basically, he sent out a 669 low-brightness--ie. ccfl backlit/250nit-- screen for the transflective/optical bonding treatment.

    i picked it up for a discount, and installed it in the car..

    this 669 has replaced a 629 that was installed in my car for about 2-3 years. the 629 did not have any problems other then the fact that i couldn't see the display on bright days..

    since the first day i installed the 669, i have had had trouble on and off with it..

    when i first went to install it, it flashed on/off-- like the ccfl tubes were too cold--it was about 40-50deg F that day. i was outside in a sweatshirt..

    it has done the same flashing motion on other days-- mostly when it is really cold outside, but it always went away after about 2 minutes.-- which was to be expected.

    but today it started, and for a 1hour drive, it did it every time i powered it on--about 4 times. and it would not stop flashing-- even after running for +5min...

    the weather channel reports that it is 40 degrees F right now. i was running errands with the windows cracked in a t-shirt-- so it was plenty warm outside..

    the problem fully described:
    it will display the zotac post screen clearly-- that displays for about 2 seconds. after the POST screen, the pc goes to a DMI POOL UPDATE screen where it looks for the hard drive, and other devices. at this screen, it starts flashing. the screen will display a image for about 1/2second, appear to turn off completely for about 3 seconds, and continue this cycle endlessly-- all the way through windows boot, and while RR is running...


    my hardware--in case it matters:
    zotac 9300 wifi edition board(nvidia geforce 9300 graphics) with 2gb of ram, pentium 5200 processor.
    dsatx power supply.
    669 low brightness screen.


    what i have tried so far:
    connected the screen to car power through the radio harness, and used the same ground as the carpc.

    connected the screen to the 12v rail of the dsatx.

    tried the VGA/USB combo cable from the 629-- in case the 669's cable was damaged.

    tried a different, higher-quality vga cable.
    this is the cable i originally had installed with the 629.

    this is the cable i just bought, and installed.


    so far, none of this has worked..

    there are times when the screen will start to work fine, but i am starting to question weather it was just a fluke when it did work correctly.


    what i need to try yet:
    run, and connect to the HDMI port. i temporarily installed a HDMI cable, and it seemed to correct the issue, but i did not have the HDMI/USB cable, so the touch screen would not work.

    so i need to further test the screen using the HDMI method..


    other possible ideas:

    connect a 12v voltage regulator to the screen, so it gets it's own dedicated power(i have a bunch of sharp PQ12RD21 vregs for a different project)

    contact chris, and see if he'll warranty it, or trade it in on a high brightness 669? like i said, it has been around 3-4 months, and while i originally told him i had this problem i had told him i had fixed it by using the VGA/USB combo cable from the 629....

    though this is really getting into the technicalities of the situation. and when it goes into detail this much, over such a long period of time, i have to question weather it is worth mine, or chris's time to deal with such things--esp. when he was selling the monitor at such a steep discount--pretty much at the cost of the screen...

    are there any other ideas? i am really starting to get the breaking point with this screen...

  2. #2
    Maximum Bitrate kegobeer's Avatar
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    Have you tried connecting a different computer to it? (Or did I miss that you tried that already?)

  3. #3
    MySQL Error soundman98's Avatar
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    not yet.. i'll go give that a shot now..

    ---------- Post added at 05:22 PM ---------- Previous post was at 05:16 PM ----------

    ok, tested it with my laptop.

    no change-- still does the exact same thing...

    and i had one other idea-- maybe it was getting some voltage fluctuation from the usb connection.

    so i tried connecting both the vga, and the usb connections to my laptop. still the same results...

    any other ideas?

  4. #4
    Maximum Bitrate kegobeer's Avatar
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    Since the HDMI connection seemed to work, I'd guess that either the breakout cable used for the VGA isn't working or the breakout port itself has problems. Since the breakout cable worked on your 629, that pretty much rules out a cable problem. The 669 should have come with a short HDMI+USB cable, right? All you need is a female-female HDMI coupler and a HDMI cable long enough to reach your monitor, and you'll have a fully functional HDMI+USB cable. Depending on how you mounted your 669, you might also need a right angle HDMI coupler.

  5. #5
    Maximum Bitrate tft_lcd_org's Avatar
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    Quote Originally Posted by soundman98 View Post

    any other ideas?
    This will take care of all of your problems........
    http://www.youtube.com/watch?v=8v7WMFvtTMY

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    MySQL Error soundman98's Avatar
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    yes, it definitely will... though being that i am in a colder climate, i am a little torn on using a capacitive screen in-car because there is many times i wear gloves during the colder days..

  7. #7
    Maximum Bitrate tft_lcd_org's Avatar
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    Quote Originally Posted by soundman98 View Post
    yes, it definitely will... though being that i am in a colder climate, i am a little torn on using a capacitive screen in-car because there is many times i wear gloves during the colder days..
    Right. You are in the same "colder" climate I am. They do make a Capacitive stylus and have you seen "cell phone" gloves? My wife has a pair. The finger tips have a coating that works on touch screens. Damnedest things. She found them at Sears no less.

  8. #8
    MySQL Error soundman98's Avatar
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    ok, humor me-- how much? for a capacitive touch transflective HB 669?

    after my experience with anti-glare coatings(i knew what i was getting into, but sometimes i need to experience it), would/could the capacitive touch screen not have a anti glare coating? or is there a alternative? i found that with my current LB 669, the AG coating diffused light so much across the entire surface, and made it harder to see the screen..


    and a really simple question i should know the answer to:

    i understand that because of the way capacitive touch works, and the parts required, it allows for a clearer, or more optically transparent touch interface.

    but, does a capacitive touch screen still require a optical bond for true transparency?

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    Keen to see what you come up with here.

  10. #10
    Maximum Bitrate tft_lcd_org's Avatar
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    Quote Originally Posted by soundman98 View Post
    ok, humor me-- how much? for a capacitive touch transflective HB 669?

    I will PM pricing to you.


    Quote Originally Posted by soundman98 View Post
    and a really simple question i should know the answer to:

    i understand that because of the way capacitive touch works, and the parts required, it allows for a clearer, or more optically transparent touch interface.

    but, does a capacitive touch screen still require a optical bond for true transparency?
    Bonding is not necessary at all for a capacitive panel. Light transmission is 92-95% compared to about 75-78% with a resistive panel. Bonding is great, but for this specific display it would be overkill.
    Glare is no where near the level of a resistive either. There is a factory applied AG coating that works well.

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