Hi Arvydas,

sounds like a controler board went down. To make sure the problem is 
on the scope side, I'd suggest you unplug all cables that lead to the 
computer or other electronics and restart the scope. If the problem 
persists, that'll be a pretty clear diagnosis.

In a next step, I' d unplug cables between the stand and electronic 
condensors, remove filter wheel etc, until you have only the naked 
stand left. It might be that the stand electronic is waiting for a 
response that is not coming. Else, it is the electronic in the stand itself.

Obviously, you'd better change things only when power is off or you 
might end up with more trouble than you start with.

Good bug hunting

Steffen


At 23:05 04.03.2009, you wrote:
>Hi all,
>
>We are having a problem with our Zeiss Axiovert 200M. It stopped
>responding to any buttons. Fuses are OK, and it is getting power.
>On the back red LED is on (as well as green one), and LCD screen
>is showing squares. Can anyone  offer some insight as to what the
>problem might be? LSM software is showing error messages for
>COM1 but computer is OK so I assume the problem is on the scope
>side.
>Thank you,
>Arvydas
>
>
>
>Arvydas Matiukas, Ph.D.
>Director of Confocal&Two-Photon Imaging Core Facility
>Department of Pharmacology
>SUNY Upstate Medical University
>766 Irving Ave., WH 3159
>Syracuse, NY 13210
>tel.: 315-464-7997
>fax: 315-464-8014
>email: [log in to unmask]