faulty neo geo 6 slot

[arcadematt]

My slot cab started playing up last night. It tries to boot up shows the green screen then shows a black screen for a second and tries booting back up again. This loop lasts only a few seconds and keeps looping over and over again. Anyone got any ideas.

 

[aje_fr]

Hello,
Is your PSU is 100% ok ? First step to find what's deffective
Bye

 

[NEO-GEO man]

Maybe try this: http://newlifegames.net/nlg/index.php?PHPSESSID=b6720fdd8e4cfbd0379b488059c03607&topic=152.0

Ive found one 6 slotter doing what yours is:

Model: MVS MV-6
Symptom: Stuck in Watchdog (a.k.a. Click of Death)

6 slot board would constantly reset... Logic probe on pin 18 of the CPU confirmed that the reset line kept bouncing. This was the watchdog circuit trying to kickstart the CPU into booting.

Checked the data lines and enable lines on the work RAM - checked fine.

Checked the enable lines on the backup RAM and discovered that the WE* line on one of the RAMs was missing its signal and the OE* line on both RAM chips was missing its signal.

Repaired the bad traces to fix the bottom board.

It appears that something corroded the plate-thrus on the board. Seems to be a common occurance on all models of the MVS boards.

That should help you out abit. There is tons of info on that site there