Question about Compaq CV 7500 17" CRT Monitor
Compaq Monitor: earlier there was no problem, but now-a-days when I turn it on (I have UPS connection also) the screen brightness increases gradually and after some time it becomes completely white, I can't see anything. Initially when the problem started I found that after some time it was normal- but, suddenly it flashes light with full brightness and I have to stop working. Now it is completely white from the begining when I turn it on.
Is this problem can be solved at home? please tell.
I have a multimeter(digital), continuity tester and other tools for my different purposes.
Contrast and brightness controls usually come from one chip. You can try looking up the specs of the chip online and then determine which pin of the chip conrols brightness. Usually faulty Electrolytic capacitors act like the simptoms you described. Find the Electrolytic capacitor connect in the brightness circuit and you will most likly fix your problem. The chip that contols the brightness might also be faulty. Good luck.
Posted on Jul 21, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
Pins 5 & 6 - Any-Mode Shutdown
1. Pin 6 of the 9-pin communication connector is used for "Any-Mode Shutdown"
of the UPS output. This control input may be used in special applications
to disable the UPS output power-both Inverter and Bypass.
2. The Options tab allows the behavior of the Any-Mode Shutdown feature to
be modified. When the program opens, or the REFRESH button is pressed,
the UPS setting is read by the configuration program and displayed.
Pin 6 Logic
If version 1.6 (or later) is used with an earlier Liebert GXT2U model (with an
earlier UPS firmware version), the Any-Mode Shutdown features cannot be
If the configuration program is used with an earlier UPS model (with an
earlier UPS firmware version) that does not support the modification of these
settings, the Options tab will display a reminder of the factory default
settings. These cannot be changed.
Note that when this option is selected and the UPS output is
disabled using Pin 6, the UPS output can turn on automatically
and without warning if the Pin 6 connection is changed.
DO NOT CHANGE THIS OPTION from the factory default
setting unless you are ready to install a normally-closed
connection between Pins 5 & 6. This connection must be
maintained to use the UPS or to use the configuration program
again, including the ability to change the UPS setting back to the
default setting using the configuration
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