Dead IBM PC 5150 motherboard - help troubleshooting

[Richard Beaudry]

Hello all,

I have an IBM PC, 5150, 16-64KB motherboard, that appears to be dead.  Power
on produces no display or disk activity (even after a while), and no beeps
from the speaker (I tried a couple of speakers, so I don't think it is a
speaker issue.

>From what docs I found on the internet, the switches are set up properly for
the machine's configuration...

I am pretty sure the motherboard is getting power.  I checked at a RAM
socket, and all voltages were there, and well within specifications.

The problem is, I'm not sure where to go from here.  I have NO schematics,
and haven't ever troubleshot a 5150 before.

I DO have a good meter, and a scope (and I know how to use it!)

What would be the first things to check?

Thanks for any help!!!
Rich B.