Hi All. Thanks for the replies. I'll now respond to them in the one
post: (save bandwidth and all that)
On Wed, 1 Sep 1999 09:54:07 -0700, Chris Adams wrote:
> Hi there- A single bad SIMM in the proper location could very well cause
> all the problems you have listed.
We had 4 SIMMs, and tried different combinations and permutations.
ie, different number of them, different order, all that. So the only
way for this to be true is if *all* SIMMs are faulty. (Or the first
SIMM socket is broken. it looked alright from the outside)
On Wed, 1 Sep 1999 16:33:47 -0600, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> Try a newer power supply, the one from the 286 could very easily be too low
> of a wattage for the 486 board, though without all the drives, etc. you
> would think it would work anyway.
I thought it would. I'll probably be seeing this again on Saturday,
so I'll look at the PSU seeing if anything can be done to it.
> Also try it with no simms, the 640k on the board oughtta at least get a
> POST going. You are sure that the monitor works with that video card?
I don't think there is any memory on the board, but I did try with no
SIMMs, same blank response. (expecting a "no memory" BEEP!)
The monitor was very similar to the one on the 286, so this can't be
much of a problem (Samsung VGA)
On Wed, 1 Sep 1999 21:51:42 -0700, Ole Juul wrote:
> Random Suggestions:
> a. Power good signal could not be recognized by old
> powersupply.
AFAIK its the power supply that gives out the power good signal,
to tell the motherboard when it can boot up. Could it be the 286
motherboard only needed say 4.7V, but the new one needs spot on
5V? (The lowest power supply voltage coming in was 4.8V IIRC)
> b. Sincne it's not even doing a post, the jumpers are
> maby wrong.
Checked all the ones I could see, looked at tables etc.
> c. Remember the colour/mono junper?
Hmmm, I reckon this would have been set right by the previous
owner. (I doubt anyone would run CGA on a 486 VLB board ;)
> d. MB short to case?
Had spacers in place. Will check this more thoroughly.
> e. Try another video card.
> f. Try with other memory.
Have to pick some up from somewhere first. (My junk box is severly
lacking)
> You're on the right track by starting only with the video
> card, but you have to get some beeps before you can tell
> anything about where the problem might be.
When I plugged the speaker in I was expecting some beeps, but nothing.
On Thu, 2 Sep 1999 03:49:37 +500, Chad A. Fernandez wrote:
> His current computer sounds like a PS/2.....it's a good computer...don't let
> him junk it. Depending on the model, it will have a few different upgrade
> paths.
Yep, still works. Works even better painted light blue. :)
What do you suggest as upgrade paths?
(BTW this 386SX beast was bought at Cash Convertors for ~$AU100)
> I would try the MB outside of the case. I suspect you have shorted the MB
> to the case.
IMHO unlikely, but will try on Saturday. Might slide some paper or
cardboard under there to make doubly sure.
>> Anyway, we didn't have any other cards, so we put the video card
>> from the 286 in (ISA VGA one), and all the SIMMs.
> Would these be 30-pin simms? If so, how big are they? Does the MB have any
> built in memory?
There may have been some bad grammar in my sentence; the cards came
from the 286, the SIMMs came from the owner. They are 72 pin SIMMs,
and I think 4MB each. No obvious markings on the chips on the SIMMs,
but I heard "16MB" somewhere. (the SIMMs are identical)
> I would disconnect all the buttons on the front of the case. I have made
> the mistake of hooking up the wrong things, and that was the reason I was
> having problems.
Didn't have anything hooked up at the start, so I tried connecting
things like the speaker to try and figure out what was wrong.
>> (The next problem is getting something more than the 40MB harddrive
>> ;)
> Where are you? I have several spare drives that I could let go cheap. I am
> in Battle Creek, MI USA. Canada is easy enough to ship to, if that's were
> you are.
Probably out of range unfortuneatly, I am in Australia. I would love
some larger harddrives for my own and some friends' survivor PCs,
though. :) 40 or 80MB just isn't big enough.
Thanks for all the suggestions, everyone. Now I have a few more ideas.
The thing is, the MB was working only days before we reassembled it.
So the obvious are:
PSU not up to scratch
video card problems
RAM has static problem
MB has static problem (MB/RAM were in anti-static bags however)
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Conrad's Conundrum:Technologie don't transfer.
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