bluethunder
Experienced Member
I recently aquired a couple IIgs, and have a baffling problem in both. They are plain ROM 1 machines with a CFFA3000, and a Briel 4MEG GS ram card.
The machines are quiet as long as I don't run GS/OS 6.01. As soon as I start that, I can here disk access noises, mouse movement noise, and a low rrrrrrr...rrrrrrr...rrrrrr coming from the machines.
I thought maybe the PS needed a recap, so I replaced all the eletrolytics in one supply, but it still does it.
I thought maybe it was my cffa3000, so I created a 3.5" boot disk, still does it.
Maybe the GS 4Meg memory card.. That was a little tougher, but I managed to get an older GS/OS (4 or 5 I think) to boot with just the 256k expansion card (512k total). Still get the rrrrr..rrrrrr.rrrrr... noise.
I'm going to throw the scope onto the power pins, and see what they look like while GS/OS is running. If i can find a high power graphics/sound demo (non GS/OS), I'm going to try that too.
Has anyone run into this before?
Cheers, Joe
The machines are quiet as long as I don't run GS/OS 6.01. As soon as I start that, I can here disk access noises, mouse movement noise, and a low rrrrrrr...rrrrrrr...rrrrrr coming from the machines.
I thought maybe the PS needed a recap, so I replaced all the eletrolytics in one supply, but it still does it.
I thought maybe it was my cffa3000, so I created a 3.5" boot disk, still does it.
Maybe the GS 4Meg memory card.. That was a little tougher, but I managed to get an older GS/OS (4 or 5 I think) to boot with just the 256k expansion card (512k total). Still get the rrrrr..rrrrrr.rrrrr... noise.
I'm going to throw the scope onto the power pins, and see what they look like while GS/OS is running. If i can find a high power graphics/sound demo (non GS/OS), I'm going to try that too.
Has anyone run into this before?
Cheers, Joe