tm-868 problem..help

b1gballin · 01-24-2006, 01:54 PM

alright so this is the problem: touch screen was working at first, went and got some gas which in turn shut the computer down, started the car back up and touch screen doenst work anymore. the calibration screen comes up and i can calibrate it, but when i get in to windows, it doesnt work. at first i messed up the screen, but once i got home, i took my keyboard out to the car which has to usb ports on it and plugged the screen into them, and it worked. i even uninstalled all the drivers and reinstalled them again, still the same thing. anybody know what the problem could be?

Kokopelli · 10-08-2006, 07:09 PM

I loaded the newest drivers I could find- and it worked great... for about 10 min. The you get, "bee-donk... boo-dink... bee-donk" and nothing.

Still looking for answers.

Eternalodyssey · 10-08-2006, 09:36 PM

Hmm, I used to be running a TM-868, and never experienced problems you are. The only issue I ever had was a calibration issue when I first bought and installed it. I had to first install the touch drivers and then plug in the USB connector. I would say re-install the drivers but evidently you have already done that. Do you think that perhaps the new drivers that you are using could have an issue with any programs that are running in parallel? Another thought might be that there could be an issue regading your USB port and even the possibility of heat inside the monitor as my TM-868 ran rather hot. I intended to cut a hole in the back of the monitor and run a fan to the back as I have hear of several people doing this to address heat. I'm NOT saying immediately run out and butcher the back of your screen but rather these are some places you could try checking.

drblast33 · 06-25-2007, 07:21 PM

I have this monitor, and it seems like everytime my car is over 75 degrees or so, the touchscreen part goes dead.... maybe it is a heat issue... anyone ever put a fan on these things?

proph · 06-25-2007, 07:50 PM

My truck is pretty hot behind the screen, but I've never had any problems... try putting a fan behind it, or pulling it out for awhile to see if heats the issue.

vibhubithar · 06-30-2007, 03:30 AM

I am reading this forum for a long time, and then I gave a go to my car PC idea. Well I have everything now in place just to test drive it in the car, hope every thing goes well :).

Well I bought the TM-686 from a guy in $140 and I think he sold it bcos its touch screen is giving a problem. Well I read the topic only after I started getting problems in it.

In one of the thread i heard that you have to change the USB controller but anyhow I won’t to avoid that as it means more time, patience and money. Hence I decided to find the root cause.

So the problem lies in the USB cable .... Really ..... It seems like that in the beginning but to be sure I cut the composite VGA cable's USB and rewired the USB connections inside the monitor it solved the problem by say 45% so there is something else that’s wrong with this screen ....

I looked closely at the screen design and there lies the problem. It’s the placement of the USB controller and the internal composite VGA cable that runs directly over the controller hence when closed pushes the controller’s connectors making them to detach from the board and hence controller can’t be found.

Solution ... as the damage by the thick composite VGA cable due to prolonged pressure on the sensitive card is huge hence ...

1. I provided some cushion below the connector.
2. Cut some holes at the back of the screen and pushed the composite cable
Away from the card.
and it works .. hope it works fro you all tooo....

Thanks for all your help .....