Arcade Collecting > Merit/JVL Touchscreen

Megatouch Force Boot problems

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mahkeymike:
After watching your calibration videos, i really think you have #1 a short in the overlay wiring, ot a broken connection in one of the ribbon cable connections to the overlay coating. If not, then it must be your controller. If its neither, then the only other idea i can think of is your cal.dat files are not being saved/replaced. In that case a reinstall will be required.

lilshawn:
i'll have to agree. something might be wrong with the cable.

for shits and giggles... when you do the calibration... place your finger on each cross and hold it there for 2 full seconds before release.

press one onethousand two onethousand release.

it's not mentioned in the manuals anywhere but it must be done this way otherwise all kinds of weird things happen.

the overlay is somewhat repairable. I have re soldered wires back onto the transducers before when they've broken off and even superglued the prism of glass used as the transducer director back onto the glass after one had been knocked off. They are pretty tough and the software is pretty resilient about compensating for errors.

it's going to require some careful slow movements but if you need to inspect the overlay transducers remove the monitor and all the cables. you will keep the pigtail of wire attached to the overlay it doesnot come off.

carefully peel the tape off the edges of the monitor. being extra careful at the corners. if you have a broken wire you should be able to see it pretty clearly. if things look good, give everything thing under the tape a good clean with iso alcohol so that it is squeaky clean. you are going to want to reapply tape to the edges again. I use black fabric hockey tape with good success. but if you have kapton tape or whatever they use under there, give 'er. make sure the wires run along the edge of the panel...not on the front of the glass.

TalkingHeadsFan:
So I sent pics of the controller to Dave to see if he had any insight on what could be causing my problem. He noted that my green wire coming off the controller "Needs to be grounded to the earth ground prong on the power cord plug.". So my green wire is attached to the wrong spot? I'm not sure where it needs to be relocated...

lilshawn:
usually it's screwed down to a spot near the bottom left side of the motherboard where the power comes in on the back side of the IDC connector.

you can easily see if this is the issue by lifting one of the screws on the back of the motherboard and putting it there, since it's ground plane of the motherboard is connected to earth ground as well.

just make sure you don't go crazy tightening it down and shorting something else out on the board. the bottoms of the motherboards are pokey under that fishpaper and a smashed down crimp connector can easily push hard enough to poke through the fish paper onto something it shouldn't.

you just need to make electrical contact with the screw for a quick test. you can sort out the original installation location later if it works.

TalkingHeadsFan:
I relocated the wire, no luck, same crap. Looks like it's the touchscreen, then.

I also noticed a brown wire coming from a connector on the motherboard, to a connector on the IO board, and then ending in a loose connector. What is this for and where is is supposed to be plugged in?

It's the two-holed white connector in this picture...

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