Benq 567s lcd monitor does not power up. Switch led blinks but goes dead. Tried replacing capacitor 450v 82uf with 400v 100 uf but did not work. please help.

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Yes it is. BenQ has a massive Cap/Transister issue. Unless you have a decen't grasp of soldering/parts ordering it might be best to buy a new monitor.

Have you tried, plugging in a nexternal monitor and cycling the monitor to external witn FN + F7 (maybe something else) if the external monitor works then you have dead lcd screen or lcd inverter.

I assume that you already try this monitor on another PC to verify that the problem is in the monitor, in this case you need to open it up and inspect the fuse, transitors, solder connections on the power/inverter board, see failed Dell monitors here for guide: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further.

this kind of trouble is very common to all LCD monitors. your inverter is shutting down. please check all capacitors at the power supply some are badged or blown on top due to hot pressure inside.

Benqs have had some quality control issues but from your description the inverter board went on you. It needs to be replaced or repaired. Expect to spend about $100 for the repair so you may want to consider just replacing the monitor.

They can be fixed. The monitor I am using right now was one of those dead ones. It took a few hours to find as the rest checked out and it turned out to be a bad ground. Unfortunately when you smell burnt electronics you are not going to get off that easy.

seems many users face same problem

Look for small power transistors 2SC5707 near yellow invertor transformers which go to backlight connectors.
But if problem is blinking power LED powersupply capacitors maybe an issue,check visualy and/or replacement.
Also fuse that maybe blown is not glass fuse near mains socket,It is semiconductor black or yellow colour labeled PFxxx near heatsinks of power supply secondary.

Please rate the solution and provide feedback.

Samir

iS A LCD FLAT SCREEN EASY TO FIX. THE LIGHT FOR THE START BUTTOM LIGHTS AND THEN THE SCREEN IS BLACK

Robert,
What happens exactly?
Does power LED flash on/off or the displat comes on and goes off?Do you get Benq screen when you power on with front power switch?
T751,752,753,753 are the transformers to be resoldered ,and resolder Transistors Q759,60,39,40,43,51.
Please check them with a multimeter if you are adept .
Please rate the solution and provide feedback.
Samir