Thank you,Mark.

Yes,there are any problem in LeCroy 9450A Oscilloscope.

After problem found.
I have checked loosen connector,IC in sockets,built in batteries.
I could not found anything wrong except low batteries(I already changed).
Trigger mode problem is not solved.

Maybe LeCroy 9450A Oscilloscope or similar type has same problem.
There are 4 Lecroy Oscilloscopes near my sights.
3 of 4 Lecroy Oscilloscopes are in trigger mode problem same as mine.

I have not service manuals or schematic diagrams for LeCroy 9450A
Oscilloscope.
Someone experienced same problem which already fixed.

So,I want any advice to fix problem.

Thank you Kishikawa

"Mark" wrote in message
oups.com...
yep, sounds like a problem in the scope

check for a loose connector or something simple, more than that and
you will need a schematic

Mark