mv-1ax repair

babeloued

New Challenger
Joined
Sep 27, 2015
Posts
52
hello every body
excuse me for my poor english,i am french
i have a problem with my slot mv1ax how have in screen garbage and a click clik clik sound.i suppose it s a problem of watcdog,so i check the bios ,i replace it with another one 'it s same thing' i replace with diagnostic bios smkdan and universe bios 3.2 'same thing'
i check all pin 68k all rams and bios.it s all ok
i have a bios there is activity on pin 15 68k but the signal come and go.i have too a signal in adress bios and come an go and a signal like good in pin of NEC d4990a.i replace the ttl 74h32 and it s is same screen garbage with this horrible sound click
please help me do repair this board,perhaps i forget somethings
best regards;););)
 

pnauts

Kuroko's Training Dummy
Joined
Jun 7, 2017
Posts
76
Where do you live in France ?
Do you have an inside pics of the board?
(just to see the chips in it)
 

babeloued

New Challenger
Joined
Sep 27, 2015
Posts
52
thanks for reply
i have fast click,work ram is ok because new ,i have try several bios ok ,and i don t know if the 68k is dead,i will try another time
is is possible neo B1 is dead how do click of death ?
please another help will coming good
thanks to try
 

babeloued

New Challenger
Joined
Sep 27, 2015
Posts
52
hello
i just repair my slot ,it is the NEO BUF bad ,who is near the 68k and ram 6264
nowi can play
thanks for your help
 
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