need help w/ megatouch bad serial ports

ponso

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I think I have a bad megatouch MB. It is not recognizing the serial ports (for the touch screen). I am out of ideas.

Anyone can point me in the right direction on repairing a serial port? I've spent way too much time on this board, maybe it's time to probe with the volt meter one last time.

Facts:
I'm average at electronics.
I have a Telco 486 Motherboard.
http://www.meritgames.com/Support_Center/manuals/board id.pdf
Both ports seem to be bad.
The touch screens are LCD with built in controllers.
Tried 2 working touch screens (tested on another computer as working in Dos & 98) on the board on both ports. Not even the dos program drivers recognizes it.
The XL HD was tested on another computer and it seems to work.
Didn't notice anything strange about the board like blown caps.
Ground is good on monitor and board.
When it is not plugged into the MB, the monitor controller light blinks green and solid green when touched; But when it is plugged into the board, it stays solid.
The XL boot states: No touchscreen controller found.
The game boots, but touch does not work.
 
Contact tech support at Merit. They can advise what to do next. It may involve either sending the board to them for repair, or an outright purchase of a new motherboard.
 
I dunno if they're the same as the older ones, but the older ones have removable (socketed) serial port chips, usually MAX232 chips. If so you can prob replace it, but again thats the older ones, not familiar with the newer ones.
 
Who cares what the problem is? You can buy a used XL board on eBay for next to nothing. How much of your time / game being down time is it worth to know that you fixed it? Just throw it away and buy a new one :)

D.C.
 
haha that's what I just did - bought a used one on ebay. Then again, I bought this one off ebay :( They always say it's not verified so that kindda sucks.

So I figured out that my Com2 is working. I just had to modify some codes in the Bat files. That's why Com2 wasn't working. I still think Com1 is shot.

Anyways, I'll post a "how to" switch to Com2 later... (once it's running smooth).
 
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