help my amiga 4000 has little or no sound output

[Darmaster70]

My amiga 4000 desktop boots up just fine. I do not get the dark gray light grey boot up screens, my screen stays dark blue. The computer seems to work just fine no problems with programs locking up, screen looks ok but when I try to play some mod files using octamed my sound is crackly and very low in volume. Does anyone have any ideas.
Thanks

[Darmaster70]

Octimed is the only program i have tried. It used to work fine but now it doesn't (octimed that is). I understand the blue screen means i might have a problem with the custom chips but not sure.

[Darmaster70]

I do not have an internal CD-ROM audio cable connected to the internal audio connector on the motherboard

[Darmaster70]

Yes I bought it used but it had an external cd-rom. I installed a scsi internal cd drive but i didn't attach anything to the motherboard. I used to get the dark grey light grey screens during boot up but now all i get is a dark blue screen through the boot up process. When i first got the machine it worked fine. I replaced the barrel shaped battery but it was not leaking anything on the mobo. I may have messed something up when i removed the battery but other than having no sound the computer seems to work fine.

[Darmaster70]

One question for you silver dragon, when your computer boots do you get the dark grey light grey white boot colors?

[Darmaster70]

Thanks for the information, My wife made me put the 4000 in the closet. She hates it when my desk gets messy. Her desk is pristine. I've got my 2000 hooked up right now as well as my Dell pc. I use the Dell for internet and work purposes and I hate windows with a passion. I think I'll pull out the 4000 this weekend and have a look.  

[Darmaster70]

Thanks for the info Mike, wish I had an amiga repairman close to me, would like to take my 4000 in and run some tests on it. Please let us know what the final diagnosis is on your machine.