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Author Topic: Sigma CRT to LCD conversion  (Read 3529 times)

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Offline Dreese

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Sigma CRT to LCD conversion
« on: November 23, 2020, 08:26:45 AM »
I'm battling an intermittently working CRT.  I have checked connections several times and can't seem to find anything lose.  Now the question is to replace the board or go for an LCD upgrade.  Any thoughts?
« Last Edit: December 06, 2020, 05:34:43 PM by shortrackskater »

Offline Badbaud

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Re: Sigma CRT to LCD conversion
« Reply #1 on: November 23, 2020, 03:22:08 PM »
Well, flat screens are all the rage these days. Give it a try.
Let them that don't want any, have memories of not getting any.

Offline Dreese

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Re: Sigma CRT to LCD conversion
« Reply #2 on: December 06, 2020, 04:18:37 PM »
Well, I finally got the VGA conversion board and arcade power supply from Amazon.  After converting all the Chinese menus to English I kept getting a "no signal" message on my LCD monitor.  When I checked the RBG sync and ground harness on the board I found out that I have no power coming off the pins.  Now I realize that the CRT was probably never the issue in the first place.  At this point I'm going to continue with the conversion.  Any idea why the video output harness has no power?  Do I need to replace the board, if so, do you know where I might find one?  See board pics above.
Thank you

Offline ncrguy

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Re: Sigma CRT to LCD conversion
« Reply #3 on: December 06, 2020, 04:52:05 PM »
if you do find one, let me know i need a B9 board myself

Offline Dreese

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Re: Sigma CRT to LCD conversion
« Reply #4 on: December 06, 2020, 04:53:51 PM »
I believe it's a B-88 board.  The only place I can find one online is from a place in China.  Really? 

Offline edoleu

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Re: Sigma CRT to LCD conversion
« Reply #5 on: December 08, 2020, 09:04:12 AM »
Well, I finally got the VGA conversion board and arcade power supply from Amazon.  After converting all the Chinese menus to English I kept getting a "no signal" message on my LCD monitor.  When I checked the RBG sync and ground harness on the board I found out that I have no power coming off the pins.  Now I realize that the CRT was probably never the issue in the first place.  At this point I'm going to continue with the conversion.  Any idea why the video output harness has no power?  Do I need to replace the board, if so, do you know where I might find one?  See board pics above.
Thank you


Can you post a link to the board that you bought? I have a few machines that have problems that I am not sure are due to the monitor or something else. It would be handy to be able to connect a VGA monitor for troubleshooting purposes.


Ethan

Offline thinkpad4by3

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Re: Sigma CRT to LCD conversion
« Reply #6 on: March 09, 2021, 05:19:14 PM »
Which game is this for Sigma?

 

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