Question about Philips Business 201B40 (White) 21 in.CRT Conventional Monitor

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Screen blanking my monitor is connected to a Nvidia Quadro Fx3000 card which has been set at the highest resolution that this monitor can has been working smoothly since the past few months.,but since tha past 10 days, the monitor screen zooms in and blanks after just 3 mins of on time. when this happens i have to switch the monitor off and wen put on again it comes on for nearly 5 mins and again the same thing happens...i need to have the problem fixed urgently... cud anyone please please help me.most urgent...

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SOURCE: monitor power problem

It sounds like an internal issue, more likely the LOPT components are overheating, possibily due to dust collection causing temporary shorts, or an arcing capacitor. The randomness is due to weather conditions, high humidity more likely to monitor wil shut down, the dryer the weather the moisture in the dust would have evaporated, resulting in nothing happening, and a working monitor. I suggest trying this first:- Unplug the monitor from the outlet, and the computer, open the case, but REMEMBER! the monitor can still pack a punch even when it's unplugged from the outlet, (once the case is open, it is completely safe if you accidently brush against a metal part, but under no circumstances (unless you know what you're doing) remove the rubber cap that's either on the top, bottom, or sides of the back of the screen, doing so can result in a massive jolt of up to 20,000 volts),use a can of compressed air to blow out the dust, making sure you clean right up to the control buttons on the front, screw the case back in place, then try the monitor, if it's still the same, and unless you are a qualified electronics engineer and would like to repair the monitor yourself, I suggest you take it to a repair shop.

Posted on Jun 18, 2007

  • 138 Answers

SOURCE: Screen's gone blank and the green power button flashes intermittently

This is the way how to examine what's wrong with your LCD monitors. After you turned it on and the screen stopped working, you have to check that if you can see the image on the screen or not by shining a flashlight into the screen, not directly but find the best angle to the screen and take a look very closely. If you can see the icons or any image, there will be a minor problem. This is because of the lamps inside screen. Some of them were broken and it is very easy to replace. If you cannot see anything on the screen, there'll be some problems with inverter board. If you have soldering tool and want to fix it by yourself, check the caps first. It may cause this problem. Some caps might show leaking or burn spot on the board because of too high temp. If you don't have soldering tool, you better go get a technician to do so. Hope this help!! If anything I can help you with, feel free to let me know.
Thank you,

Posted on Mar 26, 2008

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SOURCE: Blank screen when pushes it comes again after 2 min same problem

This is a fault solution which can be checked and corrected by you assuming that there is no component failure. There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance. The best way to check for loose connections is to tap lightly when the set is powered on, if there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, and use a good soldering iron to solder all suspected points. Sometimes the fault occurs when the set warms up; if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault. It can also be related to WEAK ELECTROLYTIC capacitors as the value can reduce in time. Based on the above method you must be able to locate the area of fault and solder the sections.

Posted on Dec 10, 2011

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