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cpp
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 Posted: Wed Nov 28, 2007 12:58 pm Post subject: CS20 help |
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I received an API CS20 yesterday that I bought second-hand. It had a
bad power supply (red LED in standby mode and would not power up). I
replaced the power supply with a spare I had and it powered up, and
LEDs are now green. Unfortunately, I am not getting output from
either serial port (I expect to see "2048 Meg of system memory,
Initializing GCT/FRU", etc etc).
I have tried the recovery options documented in the user manual by
setting jumpers on the J2 jumper block (restore factory default
environment settings, upgrade/recover firmware, and failsafe reflash
from CD-ROM). None of these jumper settings appeared to do anything,
and I never saw any kind of output on my serial console.
I also swapped all RAM from a healthy CS20 I already had - the healthy
CS20 still boots fine, and no change on the "new" machine. There is
also no change if I power on the machine with no system RAM at all.
Nothing I've tried so far has produced a visible change in the power-
on sequence. At this point, I am not sure what is wrong and could use
some advice.
I am wondering if the flash memory containing the SRM has been
damaged, perhaps when the original power supply died. Does this seem
reasonable? I found the flash memory IC on the motherboard (an
AM29F040B-120JC), and it seems I could order a replacement IC
cheaply. Assuming this was the problem, I could then do a failsafe
reflash from CD-ROM. But I am just guessing here.
Any advice appreciated. Thanks in advance. |
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cpp
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| Posted: Tue Dec 04, 2007 3:32 am Post subject: Re: CS20 help |
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On Nov 28, 7:58 am, cpp <c...@ekkaia.net> wrote:
| Quote: | I have tried the recovery options documented in the user manual by
setting jumpers on the J2 jumper block (restore factory default
environment settings, upgrade/recover firmware, and failsafe reflash
from CD-ROM). None of these jumper settings appeared to do anything,
and I never saw any kind of output on my serial console.
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A belated reply to myself. I was able to get into the failsafe
loader and restore SRM after I jumpered pins 15 and 16 in addition
to pins 1,2 and 3,4 on J2. In my previous attempt, the jumper
on pins 15 and 16 was missing. |
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