Main > Main Forum
Need some serious help with MK2 sound
Love5508:
I just got a Mortal Kombat 2 jamma board complete with the sound board and all the wiring. Its revision 3.1 and looks like new. I installed it into my MK4 cabinet and everything looks great EXCEPT....there is this constant annoying hum in the back ground. Doesnt matter how loud or quite I make the volume, the static sounding hum is always the same loudness. This does not happen with my MK4 board. I checked all the power and I am getting the correct -5v to the sound board. Its a hum that normally I would say is interference of some sort BUT when the game starts playing a demostration, the hum changes pitch depending on what is happening on screen...if the screen changes quickly from one frame then blacks out and goes to another, the hum goes with it. I have heard a new power supply may fix this issue but I think I may be in denial. :badmood:
Love5508:
I just read on these forums that the MK2 board uses p12, player 4 harness...hmm I have player 3 harness installed but I dont think that would cause this type of issue. All my controls work fine. Im stumped... ???
Malenko:
do you hear the hum when you put the MK2 in another cabinet? have you reseated the sound ROMs?
jcterzin:
if it changes with the video, could be your monitor. Are you saying that you used the same monitor when you tested the MK4 board?
Love5508:
Every thing tests fine when i swap my mk4 pcb into the cab. No monitor or sound issues with mk4. I only have this one cab. This sucks.