On 22/09/2019 14:33, Dave Plowman (News) wrote:
The new PS arrived. It's not that. ;-)

Stripped the thing down and cleaned everything. The Asus board I have is
known to have a problem with the chipset cooling, so removed that and
cleaned and applied new paste. Battery was at about 2v so replaced that
too.

It fired up and selected the BOIS page. But on configuring, saving and
exit, back to not firing up at all.

So looks like an MB failure?

I'd just buy a new motherboard, but this machine is configured for my
needs including a Serial port and not sure many new ones have this?

Serial ports can be replaced with USB converters.

If this is important, ie you're using Win98 or 95, where you have direct
access to the port pins, then it might be worth looking at eBay for used
Motherboards.

There are many systems that still use direct control of parallel ports
through the IO port using DOS or early windows so there must be a demand
for these M/Bs.

I might suggest take the new battery out and see if you can get the BIOS
screen again?