Question about BenQ FP737S-D 17" LCD Monitor

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White screen Hi u left a solution conserning my benq lcd with a white screen conserning capacitors as i hav checked all caps on power board and can see no swelling or leacking are there any particular caps i should be looking at thanks

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  • halek Sep 24, 2008

    H iv changed both caps and screens still showing white one improvment tho is when attached to my pc and turned on the screen stays on as if working but as i said still just white

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  • Master
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I believe they are two 1000uf 16 volt... there are two side by side and they are tall.

Robert

Posted on Sep 15, 2008

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White Glue needs to be cleaned off the circuit board. Common issue with these radios. Check for swelled or leaky capacitors. A radio of this age could use new caps anyhow.

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I have fp567s monitor\r\nit often goes silver while starting and it needs monitor off button to be pressed (sometimes twice/thrice) for windows / boot screen to come alive i have re-installed the driver...


The silver hwite/grey screen means that the LCD panel is not getting the signals, 5vdc from the logic board. Try reseating the connections between the logic board and the LCD panel first.
Also check the power supply caps.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series

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1 Answer

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The problem usually is from low quality or defective "capacitors" on the main circuit board. There are two capacitors in particular on the main board that causes problems with these tv's. You can check for swelled up capacitors or burn marks on the circuit board. You can also purchase an analog tester or ohmmeter and test the capacitors.
If for some reason these caps test to be ok, then test the power inverter.

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check out the power supply board! Look for popped capacitors. They either leak or swell up. They are the can shaped things on the board with the plastic coverings on them...you can usually see a swollen cap sticking up over its covering as a telltale sign.

Good luck and be careful

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I had the same problem. The power supply had a bad capacitor on the 5.3V output. The value of the cap is 2200uF / 10V. The top of the cap was swelled. With the cap changed the TV now turns on again. I hope this helps.

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check the cables. If they are OK, it may be the power supply inside the screen. In some cases it is the capacitor that blows or swells/leaked which indicated it has gone bad.

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dreaded capacitor issue. benq's were famous for it. if you are handy with disassembly and careful you can take it apart and do it yourself. look for any capacitors with rounded tops. i fixed one ... the part is only two dollars or so but it's a good feeling to know you fixed it instead of tossing it.

Robert

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6 Answers

Benq lcd Displays only white


Most often the all white screen is the result of a missing voltage to the LCD panel. We usually find an open fuse on the panel circuit board. Unfortunately replacing the fuse does not usually fix the problem.
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Mar 02, 2008 | Computers & Internet

1 Answer

Benq fp737 17


How old are the monitors?
Normally backlights last at least 30,000hrs of working.
Normally problems on Inverter board transistors near yellow inverter transformers.
Samir

Nov 28, 2007 | BenQ FP731 17" LCD Monitor

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