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Thread: Help with DWW-700H please!

  1. #1
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    Help with DWW-700H please!

    First off let me say I'm a noob at this. After researching as much as I can about car PC's I finally started getting my parts together. I chose to go with the DWW-700H for the screen. Now it seems I'm having the some of the same problems others have had with this monitor. After I load the drivers the cursor moves up to the top right corner and stays there. Occasionally, about 30% of the time, the touchscreen will work properly, but only for a few minutes. I've searched and identified what I think are two potential solutions to this. 1) Drivers. 2) The bezel is touching the screen. I have tried all the drivers from Touchkit 3.2.1.2925 to Touchkit 4.3.7.3321 with the same results. The driver loads, the controller is found and sometimes I can calibrate. With all versions the cursor will go up the the top right after a time. Reboots do not solve the problem. I found one post that suggested putting a small piece of paper between the touchscreen and the bezel in case the bezel was touching. I did that and the problem still exists. I've loosened/removed the four retaining screws holding the PCB to the back of the monitor to see if that helps. It dosen't. I've gone so far as to remove the screen from the bezel to see what happens. The cursor still moves to the upper right. I don't know what else to do. Any help on this will be greatly appreciated.

  2. #2
    Fusion Brain Creator 2k1Toaster's Avatar
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    The only thing that I can think of is attach a mouse as well and then when the screen is acting up, navigate to the calibration screen. And then use your fingers on the screen and calibrate it. See what happens.

    But I have no idea how to fix it permanantly.
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  3. #3
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    I've tried it without the mouse attached but still no luck. Now I leave the mouse attached because it's the only way I can still get around the OS.

  4. #4
    Fusion Brain Creator 2k1Toaster's Avatar
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    No I mean use the mouse to get to the menu, and then actually use the TS to calibrate it. Don't click the "X"'s with the mouse, click with the TS.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

  5. #5
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    I understand what you're saying. I do use the mouse to get to the menu and when I try to calibrate the "X" doesn't do anything to register the push and hold of my finger. I have calibrated occasionally using 4 point and 9 point but most of the time the yellow bar at the bottom runs all the way to the right and the calibration doesn't take.

    The frustrating part of this is that the TS has worked. Sporadically. Every time it works I have a glimmer of hope that it will magically "lock in" and I'll be set. Intermittent problems are so difficult to troubleshoot.

  6. #6
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    I resolved my problems. Here's how.

    I have an Avocent Switchview 8 port KVM and I had the CarPC plugged into one of the ports. The Switchview uses PS/2 keyboard and mouse connectors. I had both of those plugged in so that I could still use the mouse to get around the OS.

    I ended up using a standard USB keyboard and mouse and not using the KVM, just to see what would happen and all of a sudden everything worked perfectly. And it has been working without any problems for weeks. The mouse doesn't jump to the upper right, I can do 4,9 and 25 point calibrations and I don't get "USB device not recognized" anymore.

    I don't know why KVM PS/2 would cause this problem but I'm glad I don't have them anymore. I've even plugged the PS/2 KVM connections into a PS/2 to USB adapter and that works fine as well. I haven't tried plugging in a PS/2 mouse and keyboard in just to see what happens yet.

    Anyone have any idea why PS/2 connections were an issue?

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