MV-1 green screen problems

andy251203

andy251203

Hardened Shock Trooper
Joined
Oct 2, 2007
Posts
430
When I first bought by project 1-slot cabinet, it had an MV-1 board inside it. I have since replaced the board with a 6-slot, but I've been trying to get the MV-1 working again. It has the green screen problem. I thought it was a calendar problem, so I replaced the calendar crystal and battery, but that did nothing. I never did get a blatant "calendar error" on screen. I get "work ram test" on the screen whenever all the dip switches are on, so I assume the ram is good. Is there any other way to diagnose the problem? Would getting a unibios be able to diagnose the problem for me?

Any help would be appreciated!
 
Xian Xi

Xian Xi

JammaNationX,
15 Year Member
Joined
Dec 1, 2005
Posts
27,762
andy251203 said:
When I first bought by project 1-slot cabinet, it had an MV-1 board inside it. I have since replaced the board with a 6-slot, but I've been trying to get the MV-1 working again. It has the green screen problem. I thought it was a calendar problem, so I replaced the calendar crystal and battery, but that did nothing. I never did get a blatant "calendar error" on screen. I get "work ram test" on the screen whenever all the dip switches are on, so I assume the ram is good. Is there any other way to diagnose the problem? Would getting a unibios be able to diagnose the problem for me?

Any help would be appreciated!
Click to expand...

Check your battery if its leaking, it may have eaten away at some traces. Mine had the same problem and found some traces going bad.
 
channelmaniac

channelmaniac

Mr Neo Fix-it
15 Year Member
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Nov 29, 2005
Posts
4,316
Stuck on a green screen is a calendar problem.

It could be a bad cyrstal, bad clock/calendar chip, or a bad Neo system chip.

You could just put a UniBIOS in it. It'll bypass that problem but you won't have a clock/calendar

RJ
 
andy251203

andy251203

Hardened Shock Trooper
Joined
Oct 2, 2007
Posts
430
channelmaniac said:
Stuck on a green screen is a calendar problem.

It could be a bad cyrstal, bad clock/calendar chip, or a bad Neo system chip.

You could just put a UniBIOS in it. It'll bypass that problem but you won't have a clock/calendar

RJ
Click to expand...

Well considering I already changed the crystal and battery, I'll try looking for other traces on the board... and get a unibios!
 
channelmaniac

channelmaniac

Mr Neo Fix-it
15 Year Member
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You can also use a logic probe to verify signals on the chip to see if it is the clock calendar chip itself.

RJ
 
Razoola

Razoola

Divine Hand of the UniBIOS,
Staff member
20 Year Member
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Nov 12, 2002
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If the calander chip is not pulsing as it should then the bios will stick in a Infinate loop which could be what you are seeing. It still could be a broken trace though.
 
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