LeCroy WaveSurfer 400 Series

6.10.5 No Display (Internal or External)
V ERIFY POWER TO THE
PROCESSOR
BOARD
T HIS PROCEDURE ASSUMES THAT
VIDEO
IS NOT PRESENT ON AN EXTERNAL
MONITOR
* CONNECTED TO THE REAR PANEL AND
THAT
THE INTERNAL SCOPE COOLING FANS ARE
OPERATIONAL
R EPLACE POWER SUPPLY
R EMOVE PCI CARD
Y ES
N O
A RE THEY
CORRECT
?
I S V IDEO PRESENT ?
N O
Y ES
R EPLACE PCI CARD
R EPLACE CPU MOTHERBOARD
*External monitor must be connected to rear panel connector before power is turned on to scope.
*External video will not be present after Windows starts booting unless it is enabled from within
Windows however it will be visible for ~30 seconds after power on..
See next page for locations of power supply voltages
Maintenance 6-51