VGA converter washes out colors

MrSinister

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I bought this: http://www.jammaboards.com/store/cga/ega/yuv-to-vga-converter-pcb-gbs-8220/prod_291.html
thinking that I could use a vga monitor for medium resolution games. It works great at first, but at about 20 minutes of game play, the colors slowly wash out. They keep washing until the screen is almost completely white.

Ive adjusted everything I could think of and without an actual manual for it(never came with one)
Does any know why this is happening?
 
I think most of what they sell is cheap garbage, and proof positive that you can't get around replacing the real thing I'm afraid.

probably what you will receive from others in a few replies on here.

honestly to me it seems like one of those "too good to be true" arrangements.
 
best I can come up with is whether some components are getting hot on the converter, or maybe it's a power issue?

I can only think that something in the circuitry might just be overheating with time.

if you try soft resetting the game, do the colors come back or does the screen stay white?
 
soft reset does fix the problem temporarily. It does get hot so I mounted it near my fan. Made a slight difference
 
Maybe you can try adding heatsinks to the larger IC's to see if that helps any.

Its a shame that it doesnt work as advertised.

Matt
 
Or return it - I was gonna get one of those, hopefully that was just a dud!

I had a video card do the same thing, the video was sorta bleedy/washed out. Was a high end Elsa Gloria card that the fan seized up on.
 
Strange that a soft reset would help at all, does the screen go solid white or do the colors just change to white (ie game still playable).
 
damn did anyone else have this problem? i was going to order one but after this ill just buy a new chassis for my spare tubes instead of using pc crt's
 
the local bar has a few 8 liner machines that have dell lcd computer monitors in them and these "Made in Hong Kong rubber dog crap factory" converters. after a few hours the screens just look like crap. turn them off for a few minutes and then back on and they look fine.

I was inside one of them one day when the vendor was there but never really got to mess with it and he was completely clueless.

Don't know if that helps any, just relaying the info.
 
I bought this: http://www.jammaboards.com/store/cga/ega/yuv-to-vga-converter-pcb-gbs-8220/prod_291.html
thinking that I could use a vga monitor for medium resolution games. It works great at first, but at about 20 minutes of game play, the colors slowly wash out. They keep washing until the screen is almost completely white.

Ive adjusted everything I could think of and without an actual manual for it(never came with one) Does any know why this is happening?


Here's what I found when using one, the standard default settings of the board didn't seem to work so well with GT, so it needed adjustment.

http://forums.arcade-museum.com/showpost.php?p=780196&postcount=11

- James
 
They work...kinda sorta....

I'm using one in a neo geo cabinet and found that the way to get it going is to run the monitor and the board at the lowest resolution with none of the enhancements....this worked for Vigilante, Double Dragon, and both of my Neo Geo units. I'm thinking that it's mainly for the older 320x240 hardware.

If you're wanting to convert correctly go with one of the JROK boards. You certainly get what you pay for. His board is driving my 24-inch sony TV-in-a-cab conversion and frankly I couldn't be happier.
 
did you fix this? mins is doing the same exact thing. just installed it today in a cruisn exotica.
 
I bought this: http://www.jammaboards.com/store/cga/ega/yuv-to-vga-converter-pcb-gbs-8220/prod_291.html
thinking that I could use a vga monitor for medium resolution games. It works great at first, but at about 20 minutes of game play, the colors slowly wash out. They keep washing until the screen is almost completely white.

Ive adjusted everything I could think of and without an actual manual for it(never came with one)
Does any know why this is happening?

Yup, I use these all the time. Read the FAQ section of the instructions, section III.
You have to fiddle around with the CLAMP SP and CLAMP ST settings. Usually you have
to only change one by a single digit or two and that will solve your problems.

(The manual is online in the link you provided)

JD
 
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