maf@speech2.cs.cmu.edu (Michael Franzini) (09/03/90)
Has anyone else experienced power-supply problems with their Apollo 10000 purchased in 1988? Specifically, I believe the problem has something to do with the +5V regulator in the power supply. If you have experienced this problem or know anything about it, please send me a brief message letting me know. Thanks. --Mike maf@speech2.cs.cmu.edu
zeleznik@cs.utah.edu (Mike Zeleznik) (09/04/90)
In article <10373@pt.cs.cmu.edu> maf@speech2.cs.cmu.edu (Michael Franzini) writes: > >Has anyone else experienced power-supply problems with their >Apollo 10000 purchased in 1988? Specifically, I believe the >problem has something to do with the +5V regulator in the >power supply. We had to have it replaced. It would just randomly cause the node to crash. The local FE told me it was a well known problem, I think with a bad lot of capacitors that will fail early. Mike Michael Zeleznik Computer Science Dept. University of Utah zeleznik@cs.utah.edu Salt Lake City, UT 84112 (801) 581-5617
robinb@bhpmrl.oz.au (Robin Brown) (09/07/90)
zeleznik@cs.utah.edu (Mike Zeleznik) writes: >In article <10373@pt.cs.cmu.edu> maf@speech2.cs.cmu.edu (Michael Franzini) writes: >> >>Has anyone else experienced power-supply problems with their >>Apollo 10000 purchased in 1988? Specifically, I believe the >>problem has something to do with the +5V regulator in the >>power supply. >We had to have it replaced. It would just randomly cause the node to >crash. The local FE told me it was a well known problem, I think with a >bad lot of capacitors that will fail early. We've had two distinct types of crashes on our 1988 10K. The first was definately a power supply problem - The system would randomly shut itself down completely ie: all lights out. Inspection of the tell tail leds inside the box indicated that the 5v rail was low. We've had the power bricks replaced (twice!) and it seems to have fixed the problem. The other is also random but differs in that the shutdown is not complete. The response center do not believe it is related but I'm not so sure. The system is left at the IP0> prompt and we get error messages like: Stop CPUs with NMI... fault on CPU 0 (sometimes 1,2 or 3) pc= ...etc bus/mmu execute trap: page fault fpc=frozen fa=frozen mmu_csr=0000008A This has been esculated with the Melbourne response center and I'm sure they're doing their best, however if anyone has seen these sort of messages before I'd be very interested to hear about it. Thanks Robin -- /\/\ Robin Brown (Mr), Computer Scientist / / /\ Apollo Sys. Admin. & CAD/CAM/CAE Support / / / \ Computer Systems Group / / / /\ \ BHP Melbourne Research Laboratories \ \/ / / / 245 Wellington Rd Mulgrave Vic 3170 AUSTRALIA \ / / / Phone : +61-3-560-7066, Fax : +61-3-561-6709 \/\/\/ ACSnet : robinb@bhpmrl.oz.au