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Intellivision II video problem


7 replies to this topic

#1 tynstar OFFLINE  

tynstar

    Chopper Commander

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Posted Sat Mar 16, 2019 11:49 AM

Any one have any idea what is causing this problem and how to fix it? Here are some pictures

 

This is the problem

 

DimLbVM.jpg

 

 

Here is what it should look like

 

SMJX7og.jpg

 

Thanks



#2 emerson OFFLINE  

emerson

    Chopper Commander

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Posted Sat Mar 16, 2019 12:21 PM

My first guess would be bad a graphic RAM chip. What model intellivision is this?


  • mr_me likes this

#3 tynstar OFFLINE  

tynstar

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Posted Sat Mar 16, 2019 12:49 PM

Madel 2

Two of the three I have are doing this.

Thanks

Edited by tynstar, Sat Mar 16, 2019 12:50 PM.


#4 emerson OFFLINE  

emerson

    Chopper Commander

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Posted Sat Mar 16, 2019 2:33 PM

If you have a flash cart there is a diagnostics rom here: http://atariage.com/...-rom-available/

 

Do you get graphical issues with every game or just this particular one? What is that game?



#5 mr_me OFFLINE  

mr_me

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Posted Sat Mar 16, 2019 3:29 PM

It looks like the first four bits of a tile/sprite are fine and the last four bits are screwed up. Grom characters are not affected so it could have to do with the second graphics ram chip. Strange that you have two of them with the exact same problem.

The cartridge is coleco ladybug. All cartridges should be doing the same thing.

Edited by mr_me, Sat Mar 16, 2019 3:31 PM.


#6 emerson OFFLINE  

emerson

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Posted Sun Mar 17, 2019 4:27 AM

I'm not sure if there is a drop in replacement part for this. You could always steal the good RAM chip from one console and put it in the other. I reccommend socketing the chips if you decide to do so.



#7 mr_me OFFLINE  

mr_me

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Posted Sun Mar 17, 2019 5:22 AM

If it is the gram, it's a 4-bit sram chip, and should be easy to find a replacement. You can use your good intellivision to verify this.

#8 tynstar OFFLINE  

tynstar

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Posted Sun Mar 17, 2019 9:35 AM

I have 5 Intellivisions, 2 model 1's and 3 models 2's. It was the 2 model 2's that had this problem.

 

Thanks for the info fellas.






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