Hi everyone, just wanted to share some success I had and a tip for any noobs like myself.
I recently bought a Mortal Kombat II board off ebay; right from the beginning it had intermitted issues with what I now recognise as getting stuck in a reboot loop (as opposed to just crashing or anything). It would just barf out to the grey booting screen, flash blue and then restart ( http://imgur.com/lkRXQ ). It got worse and got to the point where it wouldn't even boot any more; it just kept restarting.
I messaged the guy I bought it from and he suggested checking the voltage on the pins. My Street Fighter 2 and Double Dragon 2 PCBs both worked fine in it but it was worth a shot.
Well, i did and it turns out mine were a little bit different to what they should have. For reference:
+5V was +4.46V
-5V was -5.46V
+12V was +11.48V
My power supply only has a dial for adjusting +5; i turned it up and found that the highest it would go was +4.87V. The other two pins stayed the same.
Instantly the board boots and I'm playing!
So, it seems less than half a volt can make all the difference.
I recently bought a Mortal Kombat II board off ebay; right from the beginning it had intermitted issues with what I now recognise as getting stuck in a reboot loop (as opposed to just crashing or anything). It would just barf out to the grey booting screen, flash blue and then restart ( http://imgur.com/lkRXQ ). It got worse and got to the point where it wouldn't even boot any more; it just kept restarting.
I messaged the guy I bought it from and he suggested checking the voltage on the pins. My Street Fighter 2 and Double Dragon 2 PCBs both worked fine in it but it was worth a shot.
Well, i did and it turns out mine were a little bit different to what they should have. For reference:
+5V was +4.46V
-5V was -5.46V
+12V was +11.48V
My power supply only has a dial for adjusting +5; i turned it up and found that the highest it would go was +4.87V. The other two pins stayed the same.
Instantly the board boots and I'm playing!
So, it seems less than half a volt can make all the difference.


