6.10.6 Internal Display Problem
VERIFY THAT THE CABLE IS
CONNECTED
BETWEEN THE CPU
BOARD AND THE TFT
THIS PROCEDURE ASSUMES THAT
VIDEO
IS PRESENT ON AN EXTERNAL
MONITOR
* CONNECTED TO THE REAR PANEL OR
THAT
THE FRONT PANEL BECOMES ACTIVE AS IF
THE
SCOPE HAD BOOTED UP AND IS
OPERATIONAL
IS +12V PRESENT?
MEASURE THE VOLTAGE AT THE
INPUT
TO THE TFT INVERTER
(PINS 1 & 2)
YES
NO
TROUBLESHOOT CAUSE
IS IT +12V?
MEASURE THE VOLTAGE AT PIN 5
OF THE INPUT CABLE TO THE
TFT INVERTER. (BACKLIGHT
CONTROL?)
YES
NO
REPLACE CPU BOARD
REPLACE INVERTER
REPLACE TFT & TOUCH SCREEN
*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..
VERIFY THAT THE CABLE IS
CONNECTED
BETWEEN THE CPU
BOARD AND THE TFT INVERTER
BOARD
Maintenance 6-53
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