On Sat, Jan 19, 2013 at 4:05 PM, Glen Slick <glen.slick@...> wrote:
**
On Sat, Jan 19, 2013 at 7:50 AM, Chris Jones chris@...> wrote:
Now I've installed ROMs version 00.02, and the 16500A has developed a
new fault: the self-tests 'HIL Controller', 'Front Panel' and 'Touch
Screen'
all fail. I thought it was a software problem but putting the old 00.00
ROMs back in the problem is still there. I'm hoping it's just a bent pin
on the backplane connector or something but it's very annoying to get
this
far and have a new fault to deal with, apparently unrelated to the RAM.
Has anyone got experience of what's likely to cause these three self-test
failures?
Chris
Don't all of those things connect through the same ribbon cable
between the front panel and the CPU board? Are you sure that cable
was reconnected correctly at both ends when you reinstalled the CPU
board? Or does that cable connect between the front panel and the
backplane board? It's been a while since I opened up a 16500.
Yes, I think they do - there's a 10-way ribbon with IDC connectors between
the backplane and the front panel which looks like it carries the data. I
checked that it was properly seated, and unplugged and reinserted it, but
with no effect. I think on the later machines this 10-way ribbon is somehow
associated with the display cable, isn't it? Anyhow, since it comes from
the backplane in the 16500A, I'm assuming that the signals to it must cross
the CPU board/backplane connector at some point, and I hope that the
problem is simply a bent pin or similar there.
Chris
