tenny@ootool.dec.com (Dave Tenny) (04/04/91)
I recently had the 68040 installed in my Cube. On the second day of real use after the upgrade, the machine died horrible death with a panic alert. I couldn't even power it down. When I unplugged it, and rebooted, I enabled diagnostics. Diagnostics said a memory bank was bad, but the machine tried to boot anyway, with all the memory. (ROm 2.2 V63). The machine failed all over the place, workspaces couldn't run, etc.. Next day, I booted. Machine booted fine. I immediately backed up critical files. When I pulled the OD, it was WARM. It NEVER used to be warm. I ran the machine four hours again another night, did a full backup, and OD came out WARM again. Part of the upgrade said to ensure my fan is blowing "in" instead of out. The service rep and I did exactly that. And yes, the fan is blowing, and terminals are hooked up correctly. (Fan will hold paper against the cube with no problem). I suspect a heat problem overall. Service rep will look at it tomorrow. But if anybody has had experience with this, and resolution, please send email asap. I don't see how the fan, blowing in, can possibly cool the board. It blows into this area with the OD and HD, which is nearly completely partitioned from the rest of the system by solid metal dividers. How can the board get any real air flow? When the fan was blowing out, there is a grid under each slot for are to circulate through the box. (I have an old cube, in case you didn't guess. And I mean OLD). So basically, everything is as NeXT recommends for configuration, the dust filter installed, etc.. But I may have board problems, (the board will probably get swapped, to make sure), and *I* think there are heat problems, but NeXT doesn't seem to think so. I don't want my OD dying because of old air flow and dust, and I don't want my board and memory dying because of the new air flow. Help! Dave