Sorry about the repeat of my original post below. I was trying to write an update and one of my cats walked over my PC keyboard.
Anyway, measured the PSU voltages and all except the 130V are high by about 10%. I did a swap of stuff with another newsgroup member and now have an R7844 mainframe as a spare. Changed the PSU and everything is OK. I'll repair the damaged PSU when time permits and post back results.
Thanks for the help.