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CRT - GroovyArcade detection issue

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SCT74:
Started playing around with the new cabinet and CRT

Booting the USB bring up the main screen.  No matter what I seem to do, i cant get a stable res out of it.

The closest i came to was Intel and NVIDIA 15khz but that just flips over and over.  In the old days there used to be a horiz sync screw you could jerk with and sort that out.

Considering is up and running with the internal WinXP IDE hdd and basically works, Id rather start with a fresh install.

Checking the windows installaion is difficult because its all blurry as hell and again .. dont want to start mucking with settings just yet.

When letting it autodetect, says nothing is found, the crt is plugged in.

The mobo is a K9N6PGM2-V
VGA Output connected to some circuit in the cabinet .. cant find any details on it
The OS has GameEX and SwitchRes installed
Seems there is NVIDIA GEFORCE drivers installed with some funky settings for a crt, which I assume is why its blurry on a lcd
There arnt many numbers on the Monitor

Its a Toshiba 9509 A66JLH92X03 4MDOO9B2 are the only numbers on it but cant find any real details

Worst case ill have to either duplicate the HDD to another so I can change the res so its at least visible
Best case is i can figure out why the flipping and see whats going on.
I guess I could always do a fresh XP+GA install and see what happens, trying to avoid XP tho.

I have tried a bunch of the settings at the first GA screen but nothing seems to work

Any help would be amazing, thanks again

Attached photo of circuit
Attached photo of screen .. that just cycles badly from top to bottom

Substring:
I'm lost, your explanations are confusing. Please detail your hardware first.

Zebidee:
First thing to know is that you have a Sharp Image multires monitor. It is printed there clearly on the neckboard in one of your photos.

It has a marked connector with both 15khz and 25khz positions - so make sure which it is. I can see part of the connector (in red) in one of your earlier photos on another thread. Your rolling screenshot earlier might be explained by it being in 25khz mode. Make sure that you disconnect monitor from power before touching the connector, don't touch it while monitor is running. To get you going for now in Groovyarcade, use the 15khz position.

Sharp Image multires monitors are actually really quite good. As Fursphere said on the other thread, that CRT monitor is the best part of this cab. They were built late 90's/early 2000's so are both more modern and less worn out than most other arcade monitors. Also, because of their era, in most cases they haven't had to work hard in hot smoke-filled environments (like me when I was younger), so that helps.

They were designed for use with recycled tubes, which is why your CRT (that is the tube/screen itself) is labelled "Toshiba A66XXXXXX", because it has been taken from an old TV. To find meaningful information about the actual SI monitor you'll have to look at the chassis itself (the main board with all the electronics). We call it "chassis" because it is the main part of the monitor, everything else (including the CRT) is peripheral, just like the chassis of a car is the main part of the car.

I've used a few SI multires monitors before, but don't have any now. There is a repairer in Western Australia who specialises in SI monitors (Jomac), but AFAIK he's mostly pretty busy and doesn't take repair orders from overseas  - so take care with it.



--- Quote ---VGA Output connected to some circuit in the cabinet .. cant find any details on it
--- End quote ---


Look more closely at this - and post more photos as appropriate. if the sync isn't getting through properly, then this is probably where the problem lies.

SCT74:
Fantastic info!  I've never really owned a CRT cabinet before but its definately fun.

Funny you should mention West AU, thats exactly where I am located and we sound of the same vintage, minus the smoke filled, Timezone was always packed in Freo.

I went on a hunt thinking where IS this connector and eventually I found the gigantic sticker saying 15/24 (staring me in the face the whole time) and can confirm its seems to be in the 15 socket.

Which is interesting that GA couldnt find it with the default 15khz option but kinda worked with the Intel and Nvidia 15k setting.  (maybe the onboard video card needs presets, hence why the current setup in winxp)

Diving deeper into the cabinet, there is a mini control board.  Im wondering if adjusting the h-hold and see if the scrolling slows down, I can mark its position with a pen to ensure it can go back.

Zebidee:

--- Quote from: SCT74 on January 29, 2025, 07:25:26 pm ---Funny you should mention West AU, thats exactly where I am located and we sound of the same vintage, minus the smoke filled, Timezone was always packed in Freo.

--- End quote ---

Yeah I suspected you were AU based, as Joey/Jomac was selling them "locally" for a while and I got a couple from him around 2010-ish for some bespoke cabs I was building (he sold out a long ago, though possible he might have a refurbed one). I still have a 20" SI chassis from him, but it's not multires like yours. It needs a new vertical deflection chip which I've sourced, but never gotten around to replacing.

I put myself through uni in mid 1980's to early 90's doing all kinds of jobs, but much of it was in hospitality doing bar/waiting work in the era before smoking was banned in public places and bars/eateries. I didn't smoke myself, but went home every night smelling like an ash tray. I even worked as a banking clerk in one of the big clubs and the lady teaching me would chain smoke right next to me. I don't know how we tolerated it. I almost became a poker machine technician at one of those places, even applied for the license, before I moved on to something better which utlised my uni degree. This is interesting to consider when seeing what I do as a hobby now (arcade cabs/repairs are very similar skills to what a poker machine tech would have).


--- Quote ---Diving deeper into the cabinet, there is a mini control board.  Im wondering if adjusting the h-hold and see if the scrolling slows down, I can mark its position with a pen to ensure it can go back.

--- End quote ---

Tweak the V-Hold to correct screen rolling vertically (up/down).

I can honestly say that the best 15khz arcade monitor image I've ever seen was when I married one of Joey's SI multires chassis with a Philips bonded yoke 29" tube from a 2000-era European TV. That went into a 4-player TMNT-style cab I built for a mate and his family.

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