shankar@SRC.Honeywell.COM (Subash Shankar) (11/05/90)
I recently had a problem with the GS, which I thought somebody on the net might be able to identify (the problem no longer exists). I turned on my GS and was greeted by a random checkerboard-ish pattern. The power light on the keyboard was on, but the power light on the TWGS remained off. Then, I took out the TWGS and put in the original 65816 (making sure that it was tightly seated) - same problem as before. So, I put the TWGS back in and turned the system on again, and same problem. This time, I pressed hard on the TWGS pins going into the CPU socket (while the computer was on), and all of a sudden the checkerboard turned color, and the system booted. The problem no longer exists. Any clues on what could be causing this, so I can take appropriate preventive measures? I don't expect it to have been caused by loose chips since I made sure that all chips were seated well after the first boot. The problem first occurred on the first boot after a move, if it matters. --- Subash Shankar Honeywell Systems & Research Center MN65-2100 voice: (612) 782 7558 US Snail: 3660 Technology Dr., Minneapolis, MN 55418 shankar@src.honeywell.com srcsip!shankar
toddpw@nntp-server.caltech.edu (Todd P. Whitesel) (11/05/90)
heh heh... you had the flip side of loose chips; you had a 'loose socket'. two years ago, when I still had only my trusty ][+, I shipped it to college. upon arrival, I observed a problem much like yours, except it was the character ROM that was 'loose' and twisting it fixed things. In order to make the fix permanent we had to take a small flathead precision screwdriver and slowly work the socket off of the board so we could get at all the pins that were part of the socket itself. we pushed each one out so it would press harder against the chip and put the socket back over them. I haven't had the same problem since. be really careful if you try it yourself, it is really easy to toast a few of the socket's pins if you are too forceful. Todd Whitesel toddpw @ tybalt.caltech.edu
zane@ddsw1.MCS.COM (Sameer Parekh) (11/09/90)
A similar occurence happened to me. I installed my TWGS but I had trouble removeing
my 65816. I booted up and I got the checkerboard pattern. (Sort of, It was
large blocks of white and black) I replaced it with my 65816 and the same happened
I went to the dealer and they fixed it. (I assume they replaced the 65816, I
should have checked, it was under warranty so I didn't. My error)
--
zane@ddsw1.MCS.COM
bh1e+@andrew.cmu.edu (Brendan Gallagher Hoar) (11/12/90)
Actually, the checkerboard pattern went away after I put all my weight on the chip...seems it just needed to be a little snugger... Brendan G. Hoar bh1e+@andrew.cmu.edu Carnegie Mellon, Inc.