I have just cleaned up a Mac IIx, installed two batteries and it booted up like a doll !

I did a number of Resets (no cold starts) installed a couple of apps from the external SCSI CDRom.

However, when I attempted a cold start, the Mac does not stay on. It just wizes up for a sec and then powers down.

As I workaround I noticed if you keep the power on button on keyboard depressed it starts up (stays on) indefinitely.

Any ideas ?