Question about SAMTRON 55V 15" CRT Monitor

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Display color has been changed to rainbow

I am using samtron 56V monitor for more than four years now suddenly the display color has been changed to rainbow. But hit the monitor on its top the color changes to normal. so what can i do.

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Its seems you have a cold solder.

Posted on Sep 15, 2007


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1 Answer

Display color has been changed to rainbow.

AS hit the monitor on its top the color changes to normal. so what can i do AS IT COMES TO normal position after hitting that cleary indicates that there is no parts failure. 1 there is a loose contact in or near crt base. 2 loose contact in connector. 3 computer to monitor cable loose.

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There are three Cathod Ray guns responsible for the millions of
colors.All colors are produced by mixing the three basic colors namely
Red Green and Blue (RGB) at suitable proportion. If any one of the
three guns fail firing then we get improper colors.
(1) Simply tap on the monitor and see the result.(Keep the monitor on during this trial.)
(2) Disconnect the Monitor.and Slap it at the back by keeping it on a pillow with the screen facing down - it will resolve the problem if the failure is due to the loosening of the Head due to repeated thermal expansion and contraction.
(3) check the signal cable for loose connection, twisting etc on both ends - at the back of the CPU and Monitor (it is fixed) -
(4)tighten the screws at the backside of the CPU

Best of luck


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