-=> On 08-20-97  22:47, Bob Levine said to Ivy Iverson, <=-
-=> About 486DX2/66 motherboard,..." <=-
 
Hi, Bob;
 
 BL> The "defective" motherboard arrived yesterday and I mailed you a
 BL> refund check this morning.  But this evening I tested the board,
 BL> and found that the speed-setting jumpers were incorrect.  J6-J7-J8
 BL> were set for a clock speed of 50 MHz, but the CPU is a 486DX2/66
 BL> (clock speed 33 MHz, with an internal doubler to 66 MHz).
 
First I tried it W/ the CPU that was in it, then I tried it with the
486DX/100 that came out of my old motherboard, and neither one worked.
I must have forgotten to change the jumper back.  My fault for that.
but the fact is that that board did not work in my machine with either
CPU.
 
 BL> With these jumpers set for 50 MHz, the BIOS displayed the message
 BL> "CPU speed 100 MHz, but the booting process ended there.
 
I couldn't even get that!  No beeps, not even a flash of light on the
screen!  (And yes, the speaker was correctly connected and all the
cards were properly seated).   I dunno.
 
 BL> These
 BL> jumper settings and clock speeds are clearly marked on the board,
 BL> as are most other settings.  Once I located the problem and reset 
 BL> J6-J7-J8 to a 33 MHz clock speed, the board booted normally and 
 BL> perfectly.
 
 BL> I tested this board before shipment, and it was pulled from a
 BL> working system where it had been operating flawlessly for several
 BL> years.  How the jumpers J6-J7-J8 got changed is anybody's guess;
 BL> it certainly didn't happen here.
 
(Explained above)
 
 BL> It's conceivable that you had other problems.  I used a single 
 BL> 72-pin SIMM in socket U17.  You may have used four 30-pin SIMMs 
 BL> in sockets U8 thru U11, in which case jumper JP5 *might* have 
 BL> needed to be changed.  (I can't test this theory because I have
 BL> no 30-pin SIMMs.)
 
Nope.  1- 8MB, 72-pin SIMM.
 
 BL> It's also conceivable that one of the board mounts in your case
 BL> was contacting a trace on the PC board, shorting out the whole
 BL> works.  I tested the board on the bench, not mounted in a case.
 
That is possible.  My case, (a mid-tower), is a bit oddball as far as
 
 BL> Anyway, I'm sorry you had the problem, but the board goes back
 BL> up for sale:
 
I'm sure that the next person will be happy with it.  I apologize for
the inconvience.
 
Catch you later... Be well.
   Ivy
 
 
 
... If this message is late, keep the tagline as a free gift!
 
          
 
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