Picture problem with monitor Intervideo arcade cabinet

[Lucas]

Hello everyone, my name is Lucas and i'm new member here, i come from Belgium in Europe and i love american states and all video games  Grin, i have a little problem with the picture of my monitor arcade cabinet (Intervideo), when i put on the game the picture is fine, but after 2 minutes i see a black ghost band on the left on my screen, i do a capkit, but nothing change. i'm very sorry for my bad english, i think here i learning to speak very fine english  Wink.

maybe one member will give me a solution to my problem ?

I place a picture of my problem without games turn on, thanks for your help Members.

[iankellogg]

i am not really sure what is the cause of that. my only guess is the input filter cap, if that is really out of spec it could cause a ripple at line frequency that would show up in the raster.

[Lucas]

Thanks iankellogg for your answer, i don't change the big capacitor on my chassis monitor and if you tell true it's possible the problem come to there. I think I'll change it soon.

i post a new picture of my chassis :

the picture not upload on the forum i don't know why  i give the link here :

http://imgur.com/bn6vxSL


the large capacitor that is not changing is the one on the top left :



link : http://i.imgur.com/R4dKHK2.jpg

i believe this capacitor is for filter voltage no ?

thanks for your reply

Lucas

[iankellogg]

The photo doesn't seem to want to load. the big cap that is almost never replaced in cap kits is for filtering AC input voltage. if the cap is really worn out it can cause issues in the raster.

[Lucas]

yes I fight to put a picture  , I put the links in my previous post, it will be easier.

[Lucas]

Hi Guys, i come back for my problem of picture on my Intervideo monitor, i change the big capacitor like iankellogg tell me if i think the capacitor have a problem, with this change my problem have not resolve   . but in the same time it's not an error to change this capacitor.
maybe you have another idea for solve my problem ?

thanks for your reply

Lucas

[iankellogg]

Do you have any game that has a test pattern like a grid? Can you post a picture of it or at least a picture of a game running with the monitor.

[Lucas]

Thanks iankellogg for your reply, i put here some picture with a game running, i have a blue elf v2, i put a red square on the picture for show the problem, sometime i see the problem and sometime i don't see the problem, maybe a problem of ground or a components in end life ?

first picture no really problem, i don't see really the black line, i put the link because it's impossible to place vignette, idon't know why...

http://hpics.li/f22fc31

others pictures i see the black line :

http://hpics.li/c4be35b

http://hpics.li/f1bd725

http://hpics.li/91524c7

here not black line visible maybe because the picture is dark.

http://hpics.li/4c6be95


here it's possible to see 3 black line   it's a poltergeist  

http://hpics.li/aad49a7


Do you think it's a bad settings on my THT with brightness and focus ?

Lucas

[iankellogg]

that still just says bad caps. i mean, it seriously looks like the classic jail bars that monitors with bad caps have.

[Lucas]

I also think that can be a bad capacitor, I'll look tomorrow because I could not change all the capacitors and it is possible that the remaining 2 or 3 is defective.

After i think I'll try to change all the transistors well I'll end up finding or failure came about is, that this is not the best method to resolve a failure but I still do not have enough knowledge in electronics to find it without going through this solution.

as soon as I did that I come to tell you if everything is ok ... again thank you iankellogg for your help.

Lucas

[John's Arcade]

You sure this is not a tube issue??? Burnt image?

[Lucas]

Hi john's it's a pleasure for me to read your message  , yes i'm sure is not a tube issue, I sent my problem has a friend electronician who live in france, and he's tell me it's probably a diode problem or a bad resistance, but for be sure i need to test with an oscilloscope...and of course i don't have an oscilloscope, i think i buy soon an oscilloscope because i love the electronic  ;)

thanks for your reply John's