UPF150/M396 confusion

[moflsh03]

I am attempting to use a UPF150 switcher PSU(150W) to power up a Forcom M396 386 board. It will not power up the board...or it will not boot. I do see a small flicker when I turn the power on , but thats it. The PSU supplies 5v, 12v, -5v and -12v. I have supplied 5v to the PG pin.
If this didn't work on other boards, I would probably have just given up, assuming something...I dont know. lol But, it WILL power up other boards! I tested it on another 386, several 486s and even 2 socket7s with Pentium 200mhz. All booted up and ran fine.
I keep thinking it may be something to do with the PG signel not being stable? Yet, I just ran a test using an Amtron pm-7400 socket 7 w/P133 OCed to 200mhz with 3hrddrives, floppy and 2 cdroms. I ran fdisk and formatted the drives for a test. Did the job fine.
I planned on using the board and PSU because of their size for a router build, but it looks like I ran into a wall.

help! Any ideas?

[FritzTheCat]

Did you try swapping in the 386 processor from the board that does work to the board that doesn't work?

[moflsh03]

FritzTheCat said:

Did you try swapping in the 386 processor from the board that does work to the board that doesn't work?

The board itself runs great. I have a couple of these. They are tiny boards with amd 386 soldered on. The PSU is a small 150watt switcher SBC(single board computer) PSU. I think the problem is something to do with the PG signal. It may need a delay before the board is actually powered up. Not sure. Its strange.