Question about SAMTRON 55V 15" CRT Monitor

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Samtron 56V monitor

The monitor`s display adjustment panel is showin "CONTROL LOCKED"
I cannot change any settings(like brightness,v-size,etc)...
wat do i need to do??
plz suggest
i have problem with my 56 v monitor.some cause the setting (like h position,geometry etc .....)of my monitor is disturbed now the problem is fix it properly.

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Its aproblem of command section.Check its components one by one.you can identify this section (the front panal buttons goes in this section and a ic in big size and pasted horizantally in the circuit).if the components are ok then change command ic with new one.This will solve your problem.

Posted on Aug 08, 2008

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I need display of 56v samtron monitor


Did you check the adjustment setting on the brightness and contrast?
These two setting can be moved and stop the CRT from displaying,
Please move these two setting to MAX and see is there any image on the display.

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The monitor`s display adjustment panel is showin "CONTROL LOCKED" I cannot change any settings(like brightness,v-size,etc)... wat do i need to do?? plz suggest


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Even i was also having the same problem. We can unlock the control lock by holding the menu button for 10-20 seconds.... But now my problem is the message "Controls locked/" appears continuously. Screen width also reduced. If anyone know the solution for this please help. thanks in advance.


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sushil91077rajbanshi@rediffmail.com

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It sounds like theres a front panel button that has become intermittant and making contact all by itself. Sometimes when you clean the screen, the cleaner will drip down between the crt face aqnd the cabinet and make the switch in front go bad. Im not sure if this is the case in your problem but its a start. If you didnt spill anything or drip anything into the front panel then your maicroprocessor could be causeing the problem, or the 5 volts that feed the micro could be noisy ie, bad filter capacitor in the power supply. Now as im sure your aware of the hi voltage inside these sets? Its best if you dont have the training to get a pro to assist you as this hi voltage can hang around inside the set even if its unplugged. Good Luck

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