None of the Turbo pumps are getting ready


A LC-MS 6490 went down during the weekend. I turned on, it blinks on orange for a minute or so, then red light blinking, makes one valve noise, and nothing else.

If I start Mass Hunter, it shows rough pump at 3.5E+0 (Agilent told me 4 should be good enough to start the Turbo).

Turbo are moving 10%-30% up and down.

I tried to turn off/on several times, but the MS always do the same (orange/red/valve noise)

We switched the two rough pumps, but Agilent said it is enough vacuum.

Not sure if this is related, but Mass Hunter show a warning message "ion source mismatch", when the right ion source is selected.

Any suggestion what could I try?


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