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G5 diag led 'errb' still lit after replacing HW

K

KJ Sullivan

macrumors newbie
Original poster
Aug 8, 2015
5
0
My 2,88GHz early 2008 G5 failed to pass post, the diag leds showed 'errb' lit indicating a failed cpu-B. I replaced Both cpus (quad-cores Xeons) and the 'errb' is still lit !?! So I replaced the Logic Board and the 'errb' led is STILL on !?! I pulled the battery and put it back, hit every possible reset this model has.
It doesn't seem to be HW.. what else can cause this? I plan to replace the battery next. It never gets to chime. Memory leds are good. Please email me directly with suggestions to fix this: urhere@mac.com
 
If the ErrB light is always on, does the same ErrB light come on after swapping the processors? I suspect that you may have tried it, but you should try that again, just as a final test.
You have already tried a different logic board.
Did you try swapping positions with the RAM riser cards?
After all that, if the ErrB light still stares at you - try a different power supply.
 
jbarley said:
So maybe the original poster will step in here and put us straight, is it a PowerMac or a Mac Pro you are trouble shooting?
Click to expand...
Haha I really don't mean to be rude by replying like this, but in the original post he wants us to email him. Sorry if I am sounding rude!
 
jbarley said:
So maybe the original poster will step in here and put us straight, is it a PowerMac or a Mac Pro you are trouble shooting?
Click to expand...
The OP mentioned "quad-cores Xeons", so that aught to have answered your question already. Probably the case similarity with the G5 and Mac Pro is what prompted them to assume what they have is an "early 2008 G5".
 
MacCubed said:
This is in the wrong thread, you have a Mac Pro, not a PowerMac G5
Click to expand...

Hi, okay I see my confusion, I have BOTH a G5 and a Mac Pro. I am using the G5 to post. I posted to the wrong forum, it should be in reference to the Mac Pro (same case). I have replaced both cpus, that should have been the same as moving cpus between processor slots, but that didn't make a change. I replaced the motherboard/ logic board and that should have made a change but didn't. So once I replace the battery, I'll try to find a replacement power supply. If that doesn't work I switching to a PC. Sorry for the wrong group.
 
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