Arcade Collecting > Merit/JVL Touchscreen

Megatouch Force Boot problems

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TalkingHeadsFan:
Thanks for your help and insight, everyone.

TalkingHeadsFan:
So, I've tried calibrating the screen a few times with limited success. Many times, it would register phantom touches and would register touches when I was only touching the cabinet frame. After doing a little research, it seemed like a grounding issue so I simply moved the machine to another outlet and onto a different table and that was fixed.

However, it still is not calibrating properly. At the "move cursor" test portion of calibration, if I slide my finger up and down the left size of the screen, the cursor slides diagonally instead of up and down with my finger, it's quite strange. Would this be a problem with the touchscreen itself, the touchscreen overlay or with the Microtouch controller? The green LED on the controller is turning solid when touching, so it's registering fine.

Thanks!

mahkeymike:
You might have a broken solder joint on one of the wires soldered onto the glass overlay coating. That is one of the tell tale symptoms of reverse direction.

See if you have colored wires going to the glass or a flat ribbon cable going to the glass. If you have the flat ribbon cable its more likely a controller issue, or in some cases a bad lcd power inverter can cause leaking interference and cause wacky touchscreen issues. In that case you need to either shield the lcd power inverter (cheap but not reliable) or replace the lcd power inverter.

lilshawn:
i've found diagonal movement on one side is usually indicative of a faulty connection to the controller or damaged cable to the overlay itself. basically somewhere between the glass and the controller.

double check the green grounding wire on the controller is secured.

it's only a couple screws holding the unit in place. you can remove the bracket and the monitor and overlay can tilt up out of the front without removing any of the cables from the monitor.

clean the perimeter of the overlay as often junk gets mashed in there and can throw off the calibration.

if the cable connection is faulty, it's usually right where it meets the glass. you can test this by pressing the connection down in this area (it's only a couple pads) and seeing if the calibration is successful.

TalkingHeadsFan:
I took your advice and removed the panel/overlay assembly and I pushed down on the overlay connection pad; no change.
Grounding wire is snug.
I reinserted the controller cable into the motherboard; no change.
Cleaned perimeter of panel, no change.

I do have the flat ribbon cable, do these controllers go bad often?

Specifically, the cursor moves diagonally on the top and left side of the screen, I took a video...







I owe you guys a beer once I get this thing and my home bar running 😉

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