Arcade Collecting > Merit/JVL Touchscreen

I just bought 2 JVL systems, updates on 3 machines 4/22

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game_nerd:

--- Quote from: lilshawn on April 22, 2022, 01:29:53 pm ---honestly it might just be a bad LVDS driver board on the echo. the caps and regulators die most of the time.

you might be able to pick up a universal board off ebay or amazon or something and replace it. it should have a standard 30 pin connection on the panel. just search up "12v LVDS 30 pin" and that should get you something that will work. throw the panel # into panelook.com and it will tell you it's native resolution and signal requirements. just be sure the LVDS you use supports the protocol. (it'll be like 1280x800 or something with a 8 bit 2 channel LVDS protocol or the like so the jumpers would be set to 1280x800-8-2)

--- End quote ---

you mean in the monitor itself, right, not on the motherboard side?
I took that monitor apart, the only 30 pin board runs along the top edge of the monitor, it's got all the screen ribbon cables attached to it, one every 2 inches or so. It doesn't look to be easily replaceable.

game_nerd:
so I cleaned up the one with the hd2 security key, pulled off heat sinks, cleaned everything, new thermal paste, etc. and it has a bad sd card/image.
I took the sd card out of the 2nd machine, (4TB) and put it in the first one, it boots like 99% of the way, checks drivers, etc.
it goes to start game system: load dc for about 5 seconds, then it flashes a quick message that says start game system: load browser for about half a second, then the screen goes blank.
If I let it sit there for 2 or 3 minutes, it reboots and does it all over again.

Thoughts?

mahkeymike:
Sounds like a bad cabinet fan, or the date is wrong in the bios. Those two issues go to a blank screen with no onscreen error.

game_nerd:
ok thanks for the info, there is no chassis fan on either of these units. There's the two that sit in the bracket above the cpu, but there are no others.
Is there a header someplace inside the unit for another fan?

I hadn't thought about the bios, I'll dig up a keyboard and try to get into it to set the time, maybe I can get this one working tonight after all.

Are you or lilshawn the guy on ebay that sells keys and imaged SD cards for these? There's a seller on ebay that seems pretty knowledgeable, on all the forums I've looked at looking for info you two seem to be the only two that specialize in these things.

mahkeymike:
I don't sell on ebay so its not me. AFIAK lilshawn doesnt either.
As far as the cabinet fan, its on the right side behind a black plastic housing. Its kind of a pita to get to, but if its missing, or not working, you will never get past that black screen. Try the bios date first and make sure its saving. You probably need a new cmos battery.

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