Centris 610 Chimes of Death

[GR8GIFT]

Well my 1993 Centris 610 gives me the chimes of death with any memory in the ram slots. Doesn't make any difference which memory chip I'm using. It will boot up fine with the 4 mb of onboard memory. So I'm guessing something has fried on the mother board memory slots.

The memory chips are working fine. I have 2 32 mb chips and a 4mb and 8 mb chip. They all work in any configuration on my 6200 power pc. And on my Centris until now.

I'm on my second mother board on my Centris. I have 2 2 gb hard drives installed and an 2x external cd drive.

I have a new motherboard (will be the 3rd in this machine) ordered from on e-bay. It will be the 3rd motherboard installed on my Centris. I Just refuse to let it go.

The video went out on the first motherboard, and seemed to be going out on the second motherboard. Then it just went to the chimes of death on me.

This Centris ran from about 9/93 to 10/06 running almost continuosly from the day I bought it before the video gave out on the original mother board. It's never shut down I just leave it running and am still using the original keyboard and mouse.

Any other ideas? The pram battery is still good at 3.62 volts.

 

[GR8GIFT]

New motherboard arrived today. And it's a quadra 610 mlb with 25mhz full chip. My old Centris iwill be a little faster now.

The pram battery only had 2.67 volts so I used my pram battery out of my old Centris board which was still good.

Now I'm up and running again. My old performa 637cd that I upgraded to a 6200 75mhz PPC with a mother board exchange can now go back to standby service.

 

[GR8GIFT]

over 70 views and no one had any suggestions?

 

[Big Bird]

I'm not sure I understand exactly what you're asking. Are you saying that your Centris randomly began giving the chimes of death on startup with the same RAM that had previously worked in it? And does the Quadra 610 motherboard you just got work fine with the RAM out of the Centris?

 

[GR8GIFT]

Yes the old Centris just died with chimes of death. It wasn't random it just quit working with any additional ram installed. It didn't make any difference what ram I had installed. I had a 8 mb, a 4mb and the 2 32 mb ram chips any 1 or 2 of them installed in the old board in either slot and I got the chimes of death. All of the RAM had been working fine in the Centris 610 before. I believe the video was also going out on the old motherboard it was starting to have horizontal lines accross the screen like the previous Centris 610 motherboard did before the video failed on it.

All the ram works fine in a 6200 75mhz ppc, and previously in the Centris 610. The old Centris board worked only with the on board 4mb of ram.

Just wondering it seems odd to me that it would not run with any additional ram installed.

The new Quadra motherboard is working fine with the 2 32mb ram sticks that would give the chimes of death in the old Centris motherboard. And the video is looking perfect on the new board also.

My performa 637cd that I upgraded to a 6200 75mhz ppc with a motherboard exchange is working fine with the 4mb and 8 mb ram in it, I just liked the Centris 610 that is now a Quadra 610 better.

 

[macintoshman]

Electronics develop copper traces inside the microchips over time, eventually causing a short. happened on some cellular satilite.