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Dreamcast with IDE mod displays black and white

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Dreamcast with IDE mod displays black and white

Postby XC-3730C » Fri Oct 06, 2017 6:29 pm

I have a Dreamcast that I bought from someone here a while ago that used to display just fine. I sent it to a buddy of mine, and it was sent back to me recently, but now it displays in black and white. I know it is the system, and not my display, because my non modded Dreamcast works just fine on the same TV and composite cable.

Is there a fix to this?

Thank you!
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Old school RGB systems I own:
Spoiler:
AV Famicom w/ NES2RGB + FDS drive w/write mod
SNES
N64
Sega Genesis 1/Sega CD 1, Super Magic Drive Plus
Sega Saturn w/mod chip + AR 4-in1
Atari Jaguar w/Jag CD
3DO (RGB modded)
PSX w/stealth chip
PS2 w/ network adapter, 120gb HDD, FMCB
Neo Geo MVS

HDTV capable systems I own:
Spoiler:
Alienware Alpha i3, 16gb RAM, 256gb SSD
Nvidia Shield TV (Android)
Xbox 360 phat Jasper RGH'd
PS3 Slim with CFW

Other systems:
Spoiler:
Gamecube platinum w/Viper case, Qoob SX, GBA player
Dreamcast w/GDemu, 128gb SD
Original Xbox v1.6 + X3 chip, green Ghostcase, 2TB HDDHitachi HDD/DVD
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Re: Dreamcast with IDE mod displays black and white

Postby MasterOfAll » Fri Oct 06, 2017 7:42 pm

Sounds like there's something wrong with the Chroma line. Look up a pin diagram, and check on the board the pins are still fine.
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Re: Dreamcast with IDE mod displays black and white

Postby GillBert » Fri Oct 06, 2017 7:55 pm

It can be a hardware issue but can be a software problem too.

Does it plays backups just fine?
Does the colour system is correctly set? (you can check this by running the Region Changer app)
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Re: Dreamcast with IDE mod displays black and white

Postby XC-3730C » Fri Oct 06, 2017 8:36 pm

GillBert wrote:It can be a hardware issue but can be a software problem too.

Does it plays backups just fine?
Does the colour system is correctly set? (you can check this by running the Region Changer app)



It plays backups no problem. I had no idea there is a way to change the color. This system has only been used in the USA.
  • 0

Old school RGB systems I own:
Spoiler:
AV Famicom w/ NES2RGB + FDS drive w/write mod
SNES
N64
Sega Genesis 1/Sega CD 1, Super Magic Drive Plus
Sega Saturn w/mod chip + AR 4-in1
Atari Jaguar w/Jag CD
3DO (RGB modded)
PSX w/stealth chip
PS2 w/ network adapter, 120gb HDD, FMCB
Neo Geo MVS

HDTV capable systems I own:
Spoiler:
Alienware Alpha i3, 16gb RAM, 256gb SSD
Nvidia Shield TV (Android)
Xbox 360 phat Jasper RGH'd
PS3 Slim with CFW

Other systems:
Spoiler:
Gamecube platinum w/Viper case, Qoob SX, GBA player
Dreamcast w/GDemu, 128gb SD
Original Xbox v1.6 + X3 chip, green Ghostcase, 2TB HDDHitachi HDD/DVD
User avatar
XC-3730C 7
 
Posts: 1118
Joined: Fri Aug 01, 2014 6:58 pm
Custom Title: We've obtained retro greatness...
Reputation: 2428

Re: Dreamcast with IDE mod displays black and white

Postby GillBert » Fri Oct 06, 2017 9:10 pm

Just run Region Changer program and see how system colour is set. If it is correct (NTSC) then it's really an hardware issue.
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Re: Dreamcast with IDE mod displays black and white

Postby XC-3730C » Fri Oct 06, 2017 9:34 pm

GillBert wrote:Just run Region Changer program and see how system colour is set. If it is correct (NTSC) then it's really an hardware issue.


Yes it is set to NTSC. Is there a fix for this issue?
  • 0

Old school RGB systems I own:
Spoiler:
AV Famicom w/ NES2RGB + FDS drive w/write mod
SNES
N64
Sega Genesis 1/Sega CD 1, Super Magic Drive Plus
Sega Saturn w/mod chip + AR 4-in1
Atari Jaguar w/Jag CD
3DO (RGB modded)
PSX w/stealth chip
PS2 w/ network adapter, 120gb HDD, FMCB
Neo Geo MVS

HDTV capable systems I own:
Spoiler:
Alienware Alpha i3, 16gb RAM, 256gb SSD
Nvidia Shield TV (Android)
Xbox 360 phat Jasper RGH'd
PS3 Slim with CFW

Other systems:
Spoiler:
Gamecube platinum w/Viper case, Qoob SX, GBA player
Dreamcast w/GDemu, 128gb SD
Original Xbox v1.6 + X3 chip, green Ghostcase, 2TB HDDHitachi HDD/DVD
User avatar
XC-3730C 7
 
Posts: 1118
Joined: Fri Aug 01, 2014 6:58 pm
Custom Title: We've obtained retro greatness...
Reputation: 2428

Re: Dreamcast with IDE mod displays black and white

Postby GillBert » Sun Oct 08, 2017 8:45 pm

Certainly there is but it's hard to say whether there is a general fix for that issue.
It needs to check the electrical diagram around video circuit and to analyze how system colour switch works. This will require a multimeter and of course some electronic skill.

One thing I can tell: the colour system is defined by pins 43, 44 and 45 of IC 401.
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