KOF96 (MVS) dead cart

Codeman1

Codeman1

B. Jenet's Firstmate
Joined
Jun 1, 2002
Posts
421
I have a dead KOF96 mvs cart, after powering on I get the usual H/W test screen (colors & squares) for a fraction of a second and then a black screen.
Sometimes instead of the black screen I get a :

WORK RAM ERROR
ADDRESS WRITE READ
00103650 ￾￾￾￾￾*5555 5545

-The * is actually a white square I just couldnt replicate it here-

Already cleaned the contacts in the cart, no eproms and no faulty solder points as far as I can see.

Every other game runs fine on my MVS.
I have a MV1FZ still running Unibios 1.0 *bows head in shame* :crying:

What can I do to fix this cart and bring it back to life?? Any ideas?
 
Razoola

Razoola

Divine Hand of the UniBIOS,
Staff member
20 Year Member
Joined
Nov 12, 2002
Posts
4,665
I have no idea whats happening there but for some reason it seems that cart is drawing to much power away from the MVS and thus causing other RAM chips not to function correctly.

Raz
 
chris1

chris1

POCKETBIKE NUT,
Joined
Oct 18, 2002
Posts
10,830
Thoughts..

Would the carts boards being in upside-down/backwards cause this..?
...............................................................................................
Mismatched boards..?Say someone put in the wrong board..Say one pcb from another game put in by mistake..
...................................................................

Boot?
..............................................
Soldering that has crossed over touching another spot..
Pins bent touching each other?
..................................................
Is this a Full solid Chip KOF 96 or EPROM version..?

Did it ever work?
 
Codeman1

Codeman1

B. Jenet's Firstmate
Joined
Jun 1, 2002
Posts
421
chris1 said:
Thoughts..

Would the carts boards being in upside-down/backwards cause this..?
Click to expand...

Nope... the boards seem good comparing to other carts... board with the sound and program roms on top, component side up.

chris1 said:
Mismatched boards..?Say someone put in the wrong board..Say one pcb from another game put in by mistake..
Click to expand...
No, the NGH# matches on all the chips, 214.

chris1 said:
Boot?
Click to expand...
No eproms and legit label with serial.

chris1 said:
Soldering that has crossed over touching another spot..
Pins bent touching each other?
Click to expand...
Not that I can see.....
chris1 said:
Is this a Full solid Chip KOF 96 or EPROM version..?
Click to expand...
Full solid chip, no eproms

chris1 said:
Did it ever work?
Click to expand...
DOA, came with a bundle of carts.
 
Razoola

Razoola

Divine Hand of the UniBIOS,
Staff member
20 Year Member
Joined
Nov 12, 2002
Posts
4,665
I sopose you could open the game and try each PCB on its own or in connection with PCBs from another game cart to see if you can narrow down which board is causing the problem (P,V ROM board or C,M,S ROM board). That may help locate the problem.

Raz
 
Codeman1

Codeman1

B. Jenet's Firstmate
Joined
Jun 1, 2002
Posts
421
Razoola said:
I sopose you could open the game and try each PCB on its own or in connection with PCBs from another game cart to see if you can narrow down which board is causing the problem (P,V ROM board or C,M,S ROM board). That may help locate the problem.

Raz
Click to expand...

Ok, just tried it. The top board gives the same error and the bottom board seems fine, it goes trough the test routine and stops at the squared test screen (like when you have no cart inserted)

So I guess the problem is with the top board (P,V rom board).

Dont know if this helps but it has 3 V roms, 2 P roms, 3 LSxxx 14 pin chips and a SNK PCM chip.
 
chris1

chris1

POCKETBIKE NUT,
Joined
Oct 18, 2002
Posts
10,830
Razoola said:
I sopose you could open the game and try each PCB on its own or in connection with PCBs from another game cart to see if you can narrow down which board is causing the problem (P,V ROM board or C,M,S ROM board). That may help locate the problem.

Raz
Click to expand...

So could I do this with my Dead Riding Hero cart that doesn't show up at all..?
If I put that cart in any of my cabs it doesn't show up as being there..

What other games would be best to use..?
Is there a risk involved?

Would it actually work as a working game with another games pcb in it..
Which pcb is which..?

I'd sac and old cart that I have a dozen of to get this one going..
 
ttooddddyy

ttooddddyy

PNG FTW,
Joined
Nov 29, 2001
Posts
8,335
chris1 said:
Thoughts..

Would the carts boards being in upside-down/backwards cause this..?
Click to expand...

As a side note, it would be difficult to do this as each board has different key way cut out locations opposite the pin outs/edge connect that locate in the cart shell. To do it would require some force.
 
ttooddddyy

ttooddddyy

PNG FTW,
Joined
Nov 29, 2001
Posts
8,335
chris1 said:
So could I do this with my Dead Riding Hero cart that doesn't show up at all..?
If I put that cart in any of my cabs it doesn't show up as being there..
Click to expand...


My Blazing Star cart did that recently (after not playing it for a while) turned out to be moisture had caused corosion only in a very isolated area (would not notice it at a glance) that caused an open circuit track, bridging it fixed the cart. Id advise a real close inspection of the tracks especially near the edge pin outs.
 
dogtoy

dogtoy

Haomaru's Blade Shiner
Joined
Nov 24, 2003
Posts
689
Could corrosion cause sound to stop working and the rest of the game to work beautifully? My Blazing Star was cheap bc the sound didn't work but the rest of it did. I have never gotten any error messages from using it and all the NGH chip numbers match, but there is just no sound, very odd.

SHould I run it through the dishwasher and see if that helps any? Or just look really closely with a magnifier for bad solder joints. Unfortunately I don't have a logic probe :confused:
 
ttooddddyy

ttooddddyy

PNG FTW,
Joined
Nov 29, 2001
Posts
8,335
No harm in trying the dishwasher trick.

The area most prone to corrosion damage is between the edge connects and where the tracks go through the slotted bottom cover, thats where shit tends to accumulate.
 
NEgO MANIAC

NEgO MANIAC

Over Top Auto Mechanic
15 Year Member
Joined
Jan 5, 2004
Posts
856
I have the perfect fix. Take $12 and buy another KOF 96. Works every time!
 
Razoola

Razoola

Divine Hand of the UniBIOS,
Staff member
20 Year Member
Joined
Nov 12, 2002
Posts
4,665
I sopose whats needed now is good scans of both sides of the pcb causing the fault to see if anyone can spot anything wrong with it. I sopose if you have a Universe Bios and can get it to the splash screen (skip the errors) you could do a crc check to see if the P ROM info is good. However, becuse that PCB is causing problems it may fail still while the data on the chip is good.

From the type of error I would suspect that some traces are shorting somethere on the PCB.

I don't think you can cause any damage by mix and matching seperate PCBs from carts as long as you always make sure they are put into the correct SLOT of the 2 available (P ROM PCB goes in front of the C ROM PCB) and they are not in the wrong way around.

Raz
 
chris1

chris1

POCKETBIKE NUT,
Joined
Oct 18, 2002
Posts
10,830
Sorry for derailing the thread/may prove useful in future.

What I figured out today..

I took the non working Riding Hero and tried each board with boards from a working Riding Hero cart..
The only differences I can see between the two are 2 resistor colors are different between the to pcbs.

....................................................
(2 bad pcbs 2 good pcbs)

I first tried the bad Top board with the good Bottom board and nothing,..It will not work,or show up as being in the cab.

I then tried the Good Top Board with the Bad bottom board and the game works..(surprised)

What I'm left with is a Bad top Riding Hero pcb/board that I can't see anything wrong with..(Both these carts are super clean)

The board with the X on the chip is the bad board..

What to do next?
Explanation please...thanks.

2005_0312_190809AA.jpg
 
Razoola

Razoola

Divine Hand of the UniBIOS,
Staff member
20 Year Member
Joined
Nov 12, 2002
Posts
4,665
I'm looking at the p1 ROM on the bad board and I dont know if its just the angle of the photo but it looks like the chip is somehow warped on one side. It may just be the angle of the photo though.

Can you scan both sides of that board?

Raz
 
chris1

chris1

POCKETBIKE NUT,
Joined
Oct 18, 2002
Posts
10,830
Razoola said:
I'm looking at the p1 ROM on the bad board and I dont know if its just the angle of the photo but it looks like the chip is somehow warped on one side. It may just be the angle of the photo though.

Can you scan both sides of that board?

Raz
Click to expand...

Sure Raz..I'll scan it tomorrow

Sorry,I got caught up in some other stuff..,Thanks..
 
N

neo_X7

Disciple Of Orochi
Joined
Jan 5, 2004
Posts
3,285
NEgO MANIAC said:
I have the perfect fix. Take $12 and buy another KOF 96. Works every time!
Click to expand...

That is what I had to do with my Samurai Showdown 4 MVS cart. :very_ang:
 
chris1

chris1

POCKETBIKE NUT,
Joined
Oct 18, 2002
Posts
10,830
Razoola said:
I'm looking at the p1 ROM on the bad board and I dont know if its just the angle of the photo but it looks like the chip is somehow warped on one side. It may just be the angle of the photo though.

Can you scan both sides of that board?

Raz
Click to expand...

Here you go Raz..

The chip looks normal by looking at it up close..

I can send you some very big picks of this board ..
Just PM me where to send them if you like.

I'd like to fix this..Or get an understanding of what could of went wrong with this..
Is there one chip on this board that may be have went bad..?..(for me to focus on..

050324161831P.jpg

050324161127.jpg


050324161226.jpg
 
Razoola

Razoola

Divine Hand of the UniBIOS,
Staff member
20 Year Member
Joined
Nov 12, 2002
Posts
4,665
Can you check the back of the pcb by the in and out parts on the edge, from the photo that looks a little rough, almost as if the solder points are touching each other.

Raz
 
You must log in or register to reply here.
Top