Well for lack of a better alternative I rebuilt the computer. Fortunately the DC-DC power supply was fine but I replaced everything else. I installed a MSI H61M-P23 mother board (an almost direct replacement), intel Core 3 processor, 4 gigs ram and new sata HD & DVD plus Windows 7. One big plus is that CPU fan is much quieter than stock. Plus it boots super fast without all those little programs (craplets) running in the background. Total cost was $477.91 before tax, not cheap but the system works again and much better than before.
2007 Allegro Bus 42 QRP, 400 ISL now 2017 LTV Serenity on a 2016 Sprinter chassis