I have an Agilent 3458A with an ERRSTR 209, HARDWARE FAILURE -- TIMEOUT: UNABLE TO READ A/D: 219 and 114, STSTEM ERROR -- multislope rundown convergence. It is intermittent. I had replaced the A/C board because it had burned up components and now have these error. Elsewhere on this forum it looks like others suspected the A/D Converter and Inguard Logic A3 board but could it be a bad new A/C board?