Main Restorations Software Audio/Jukebox/MP3 Everything Else Buy/Sell/Trade
Project Announcements Monitor/Video GroovyMAME Merit/JVL Touchscreen Meet Up Retail Vendors
Driving & Racing Woodworking Software Support Forums Consoles Project Arcade Reviews
Automated Projects Artwork Frontend Support Forums Pinball Forum Discussion Old Boards
Raspberry Pi & Dev Board controls.dat Linux Miscellaneous Arcade Wiki Discussion Old Archives
Lightguns Arcade1Up Try the site in https mode Site News

Unread posts | New Replies | Recent posts | Rules | Chatroom | Wiki | File Repository | RSS | Submit news

  

Author Topic: joust moinitor color not quite right upon startup...  (Read 1869 times)

0 Members and 1 Guest are viewing this topic.

fixedpigs

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 627
  • Last login:Today at 01:49:11 pm
  • warning: drew can't handle my avatar...
joust moinitor color not quite right upon startup...
« on: May 01, 2008, 12:38:12 am »
so i turned on my joust yesterday and the color was off...i looked at the image to see what exactly wasn't quite right...

it looks like the red isn't quite 'full'...

the black background isn't totally black...it's a tiny pseudo-checkerboard pattern of black & red...

but...after about an hour of it being on...it turns normal & stays normal until i turn it off for a while & then turn it back on after a few hours...the reds are in full effect & the black is actually black...

the monitor had a cap kit done on it before i got the machine...and actually the monitor looks really great...

i've had the cabinet for about six weeks now...

any ideas of what it could be...?

thanks... :cheers:

qrz

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 1056
  • Last login:October 24, 2015, 03:04:15 pm
  • wrangling electrons since 1978
Re: joust moinitor color not quite right upon startup...
« Reply #1 on: May 01, 2008, 06:22:04 pm »
doubtful a monitor issue .
 check connections to monitor,  and reseat all socketed ic's and edge connectors on the game pcb.
hopefully , it will be nothing more .....

qrz

SirPeale

  • Green Mountain Man
  • Global Moderator
  • Trade Count: (+23)
  • Full Member
  • *****
  • Offline Offline
  • Posts: 12963
  • Last login:August 04, 2023, 09:51:57 am
  • Arcade Repair in New England
    • Arcade Game and Other Coin-Op Projects
Re: joust moinitor color not quite right upon startup...
« Reply #2 on: May 01, 2008, 08:11:48 pm »
How about a picture?

fixedpigs

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 627
  • Last login:Today at 01:49:11 pm
  • warning: drew can't handle my avatar...
Re: joust moinitor color not quite right upon startup...
« Reply #3 on: May 02, 2008, 02:05:39 am »
How about a picture?

yep...here's a few...

see how the lava isn't even red...?

"credits 0" at the bottom center is really dark red...whereas it should be bright red...

today it took about two hours for the color to jump back to normal...

SirPeale

  • Green Mountain Man
  • Global Moderator
  • Trade Count: (+23)
  • Full Member
  • *****
  • Offline Offline
  • Posts: 12963
  • Last login:August 04, 2023, 09:51:57 am
  • Arcade Repair in New England
    • Arcade Game and Other Coin-Op Projects
Re: joust moinitor color not quite right upon startup...
« Reply #4 on: May 02, 2008, 08:05:27 am »
Check the red color transistor on the neckboard.

qrz

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 1056
  • Last login:October 24, 2015, 03:04:15 pm
  • wrangling electrons since 1978
Re: joust moinitor color not quite right upon startup...
« Reply #5 on: May 02, 2008, 09:53:17 am »
didn't see any evidence of the checkerboard pattern originally described.
since the red improves when left on , i am inclined to think the red gun is getting weak.
however , a borderline output xistor can give unusual symptoms.
as Peale suggested , do check  it.....

qrz

fixedpigs

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 627
  • Last login:Today at 01:49:11 pm
  • warning: drew can't handle my avatar...
Re: joust moinitor color not quite right upon startup...
« Reply #6 on: May 02, 2008, 08:53:37 pm »
Check the red color transistor on the neckboard.

what would i be looking for...any obvious signs that something is up with it...?

didn't see any evidence of the checkerboard pattern originally described.

it's actually in effect in the first photograph...the black background isn't black...it's like a dark red...the checkerboard effect is like each pixel is alternating black/red...tiny checkerboard effect...

qrz

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 1056
  • Last login:October 24, 2015, 03:04:15 pm
  • wrangling electrons since 1978
Re: joust moinitor color not quite right upon startup...
« Reply #7 on: May 02, 2008, 10:05:40 pm »
without a dmm , transistor tester or replacement  , just sub it w/either the blue or green drive xistor .
if the problem transfers to a diff color , the xistor is likely faulty....

qrz