Question about BenQ FP71G 17" LCD Monitor
The LED light does not come on when the On button is pushed. On the main circuit board the fuse, power diodes and main switching transistors seem OK. Is a circuit diagram available? I am a now retired electronics Engineert.
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Typical failure is High voltage supply. Can you hear a high pitch whine or the relay click on and off? You will need some test point reffence voltages for the board and confirm you do not have a damaged VGA cable. It is not easy to give step by step via forum. Google "monitor repair", there were a couple good general guides that are printable. If youe high voltage tranformer (flyback) is gone, do not go any further. Price of a monitor flyback is $65 to over $100 depending on model.
Posted on Apr 10, 2007
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 .
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Posted on Apr 25, 2008
Check four 5707, two 9204, and one bel 3A slow blow fuse. Also re-solder all cap and transformer.It's quiet common on benq and Dell(benq OEM) 17 LCD. For detail google "benq 5707", sure you can found. Good luck
Posted on Jul 19, 2008
What is the exact question? Rxxx for resistor, cxxx for capacitor, uxx for IC, DXX for DIODE, QXXX for transistor, TXXX for transformer, FXXX for fuse.
Posted on Nov 01, 2009
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