Sounds like it may be a laser power supply problem .

My 2c

Cheers

G.Liu wrote:
> Hello Listers,
>
> In last few days, the argon laser in our Zeiss 510Meta encountered twice the
> shutdown problem during operation: the readings of laser current became
> -0.2A (output at about 75% position). When dragging back to 25% output, the
> current become normal (4.5A). Those happened, at one time, during "Reuse"ing
> the configuration of an old image; and at other time, during switching
> users. 
>
> Is this problem caused by inappropriate operation or Argon laser's lifespan
> is almost reached, or other reasons? Any advice will be greatly appreciated! 
>
> Guosheng
>