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My monitor Goes blank after about 2 seconds

I have SAMPO monitors part number LME-1722 that have a BNC input that I'm useing for security. They are about a year old and now they are starting to go bad. What they do is when I power them up they display an image for about 2 seconds and then go blank. Is there a repair for this problem that I could try? Note the problem is the same on all inputs.

Thanks Dave

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Dave, You failed to state if these monitors are LCD/FPD or are they old tube type? I'm going to assume that they are of the flat screen lcd type. all monitors of the lcd type need what is called 'backlighting' to display the video information. In your case, maybe the inverter power supply board has detected a fault and go's into immediate shutdown mode. the inverter supply is what lights the long slim cold cathode fluorescent tubes (2) that are used for lcd backllighting in 98% of all small screen lcd monitors. There isn't a lot you can do about these types of failures. You can check with Sampo and see if they have a swapout program where you send old monitor plus some cash and they send you a refurbished ( new tubes+inverter board ) monitor. I myself kinda lucked out when a co-worker brought in his Dell lcd. we opened it up and found some bad capacitors that couldn't take the heat generated inside the case. Yes we unsoldered and replaced them with new and it worked. But that was pure luck. could have been a lot of other things wrong too. you might want to surf around and check out slectronics.net/ or other sites that deal with monitor CCF tubes and inverter repair. the lighting technology you are dealing with is similar to the new 'curlie-que' energy saving-screw-in light bulbs! Hope this helps you out some. I'm lmistyrel @ aol or louie12fix on fixya.

Posted on Mar 04, 2009

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