How do you fix a How do you fix Benq LCD TV DV3750 that has no power and does not turn on?
I had this LCD TV for about 2 years and suddenly it stop working, will not turn on and has no power. It made some static noise then it just stop working. The rest of my entertainment system (audio receiver, speakers, subwoofer, radio) still works, powers on in the same electrical outlet with a power surge protector.
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If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
its better if you replace the whole power supply board rather than replace the burnt surface mount parts because commonly if the surface mount parts burnt out there are some shorted parts that cause that burnt and possibly repeat the problem..
I have the exact same part burned at the bottom. I just used a long nose plier and bend the bottom so it touches the print board circuit. It works. I guess I could also use a soldering iron to fix it. But will see if this temp solution works or not.
For the monitor that is more than 2 years old, first place to look will be the power supply, look for bad caps with bulging top first, post back what you see inside so we can guide you further, see example of failed monitors due to bad caps; http://s807.photobucket.com/home/budm/allalbums
If it's possible, install a small computer style fan and direct the air stream over the power supply. You should then get another 10 years out of it. Unit needs ventilation and cooling air. Hopefully, it isn't installed in tight quarters.
I have had this problem twice once at my school and once with my BenQ FP71G Monitor. At my school the monitor ( HP ) just stopped working and smelt like burnt popcorn.(though is think this is due to some kids chucking a soccer(football) ball at it! With my BenQ it has the same problem though i nownthink it is because of the monitor has been on for excessive hours ( 3-4 ) and just shut down because of overheating. I will see in a couple of hours if it works !