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Troubleshooting - 60-in-1 to CGA/VGA SuzoHapp VisionPro monitor loses picture
mtdukes:
Hi all, I'm new to this and trying to learn, but I recently acquired and am trying to fix a Midway-style multicade arcade cabinet with a 60-in-1 CGA/VGA Jamma board connected to a 19" SuzoHapp VisionPro monitor (Model No. K190NAD). I'm told it worked at some point over the past year, but stopped working after it was moved to a new location. When the cabinet is turned on with the DIP switch engaged in both normal mode and either CGA or VGA mode, I see a brief image of the boot text on the monitor before it blinks out and I lose picture.
I think I've narrowed down the problem to the monitor, but I'm not sure where to go from there. Here's what I've figured out so far:
* I can get normal picture from the arcade board when I connect it via VGA to another external monitor.
* Once the boot sequence is complete, and the LED on the arcade board starts blinking green, I can hear audio from games selected and launched from the title screen from the external speaker, but get no picture.
* I've successfully tested the existing VGA cable with other devices.
* Both the monitor and the board appear to be receiving appropriate voltage from the SuzoHapp Power Pro Switching Power Supply, and I'm seeing green on the LED of the monitor's power cord brick.I'm continuing to troubleshoot, but I figured I'd check in to see if there were any known issues with this particular monitor I should be focusing on.
Thanks in advance for any advice you can offer!
lilshawn:
problem is, the 60-in-1 don't use a standard VGA signal. i don't know why and I don't know what is different, but i have a hard time sometimes finding computer monitors that will properly sync up without the picture being half off the screen and having to adjust a pile of settings manually to get it centered on the screen properly. (even doing an auto adjust makes the screen half off.) it's entirely possible that the monitor just will not sync properly.
try booting the 60-in-1 with dip switch 4 turned on, this will boot it into the test mode whereby the first screen is a test pattern you can use to align and/or try and get the monitor to sync to.
grantspain:
if you disconnect vga cable does your monitor remain on, normally would have a no signal message
mtdukes:
--- Quote from: lilshawn on August 27, 2023, 09:13:10 pm ---try booting the 60-in-1 with dip switch 4 turned on, this will boot it into the test mode whereby the first screen is a test pattern you can use to align and/or try and get the monitor to sync to.
--- End quote ---
Thanks for this suggestion. I've tried to walk through the test/service mode on the VisionPro monitor installed in the cabinet, but haven't been able to even generate the test pattern on that screen. I successfully navigated through the test/service mode when I hooked the board to an external Samsung monitor using the VGA cable - that all worked fine. It's weird, because the monitor installed in the cabinet did work at some point, and I'm wondering if something got jostled/broken during a prior move to a new location...
On normal boot with the VisionPro monitor, all I see is a flash of this initialization message on the screen for a fraction of a second before it goes dead.
--- Quote from: grantspain on August 28, 2023, 02:40:04 am ---if you disconnect vga cable does your monitor remain on, normally would have a no signal message
--- End quote ---
Good question. I am NOT seeing a "no signal" message when I disconnect VGA or CGA, but I'm not sure if this model of VisionPro monitor generates that message (there's nothing about it I could find in the manual or spec sheet). Does anybody know?
FWIW, I'm also not able to get any sort of picture out of the monitor if I hook it up to a laptop via a normal VGA connection. The laptop recognizes the display, but the monitor screen remains black.
Any other ideas would be welcome!
lilshawn:
hmm... it's possible that there is something wrong with the backlight circuit/board. it's a common place for capacitors to go bad and the monitor to kind of work, but cause it to go blank after some time (from seconds to minutes.)