Hello Brian, as it turned out, the problem was that I had an old version of the Polisy BIOS. Apparently, that version was using com1 as default kernel output. Now that I have updated the Polisy BIOS, all is back to normal.
I got my PLM from Aartech.ca, a genuine distributor of both UDI and Insteon products. However, this PLM was part of their surplus sold as is. They told me it had been recertified, whatever that means. Hopefully, the bad capacitors were replaced. Otherwise, I'll do it myself since there are not too many units available for purchase.
Thanks for all your help.
