BenQ FP72G 17" LCD Monitor NO DISPLAY
posted by rickyykk on Apr 22, 2008
I've replaced 1 X 2SC5707 (Q808)
I've also replaced 1 X FU9024N (HexFET Power MOSFET)(Q805)
re-soldered all the legs of the 4 transformers
but still not working, NO DISPLAY,
it's even worst this time, when i shine a torch on the screen, no dim display at all ???
Solution #1
posted on Apr 22, 2008
GuruCheck the ribbon from the video card to the back of the panel. It has to be aligned perfectly and locked down in the right position at the video card side, and pushed in corrctly to the panel.
The section that contains the inverter circuit is totally seperate from the rest of the power supply. Seperated by the fuse link marked FBxxx.
The section that contains the inverter circuit is totally seperate from the rest of the power supply. Seperated by the fuse link marked FBxxx.
Comment by Mark_Webber, posted on Apr 22, 2008
If you understand what to stay clear of, then check the voltage on either side of that fuse link with the unit on and connected to a running video source.
If your not familiar with it, then do the original test using continuity on the MM without power being applied. It has to have full tone for 10+ seconds. That fuse supplies the power to the inverter and should be between 18-23v with no load.
If your not familiar with it, then do the original test using continuity on the MM without power being applied. It has to have full tone for 10+ seconds. That fuse supplies the power to the inverter and should be between 18-23v with no load.
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