ams@gauss.Princeton.EDU (Andrew Simms) (02/19/90)
I recently bought 16MB of additional memory to added to my RC3240 (an upgraded m/120). I installed it and all was well until the login: prompt. The system then crashed and core dumped. I assumed one of the boards was bad, so I removed one (for those sure to ask, all install/remove sequences occurred on a powered off/power cord removed chassis) and rebooted. Same problem, reboot after login: prompt. So I then take out the remaining board and replace it with the first. This gets confusing, see below: 1. First step, I installed the two new memory boards. This made the memory configuration look like this: ---Original Memory--- ---Original Memory--- ---New board 1------- ---New board 2------- Result: The machine booted all the way to login: and then crashed and dumped. 2. Change to: ---Original Memory--- ---Original Memory--- ---New board 1------- Result: Crash after login: (same as 1). 3. Change to: ---Original Memory--- ---Original Memory--- ---New board 2------- Success, assumed New board 1 was bad, called MIPs and received a replacement, New board 3. 4. Change to: ---Original Memory--- ---Original Memory--- ---New board 2------- ---New board 3------- Result:, you guessed it, crash after login: 5. Change to: ---Original Memory--- ---Original Memory--- ---New board 2------- Result: CRASH after login:! I then shutdown and wiggled the board a bit. This time no crash. I am confused. PCB feed through problem? on the system board or the memory?? I haven't succeeded yet in getting 32MB to work. Other source of potential problems, an IPT appletalk controller installed in the machine. Any suggestions from anyone? Unfortunately taking the machine down hoses 15 X window terminals, so if anyone has a solution or ideas please pass them along. Thanks---ams ---------------------------------------------------------------------- Andrew Simms ams@acm.princeton.edu System Administrator Program in Applied and Computational Math Princeton University Princeton, NJ 08544 609/258-5324 or 609/258-6227 609/258-1054 (fax) testmailsig