Good evening. I have a problem with a computer not POSTing. It is a
486/66, and /or a Pentium 166 (I have 2 motherboards) I originally was going
to upgrade to the 166, but ran into problems.
    The 166 tested out fine with just the motherboard, 166 chip, 32M of RAM,
and a video card attached to an extra power supply (no OS). It posted fine
and I got a display on the monitor. The hard drive spun up and it sought the
floppy drive ok. That was as far as I had tested it.
    I then tried to install it into my AT case. I did not get a post, I did
not get a monitor display, the hard drive spun up, and it sought out the
floppy. I tested another known working monitor and it still didn't display.
I replaced the 166 motherboard with the 486/66 motherboard  (and another
video card) and it did the same thing. A note to say that when I
disconnected the video cable from the video cards,   I did get a raster (on
both of the monitors).
    My next step was to drag the motherboards out of the case, in case there
were any shorts, and still got the same thing on each motherboard.
    The only things I seem to be left with are bad P8/P9 connector voltages,
or bad RAM. I can't believe that both motherboard RAMs are bad,  so I
suspect the plugs are bad. I can't get to a meter until next Monday, so I
was wondering if anybody out there had any ideas of anything else I could
try before next Monday rolled around.  Also does anybody know the voltages
from the P8/P9, and what pins have what?
                                                Thanks Wayne Harris

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