Question about Compaq FP 7317 17" LCD Monitor

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Light the light of the screen falls uot after a while. I can see what I was doing, but I've a black screen and I can see a little bit of of what I suppossed to see. i don't know that this is enmough information greetz, kevin

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Make sure you unplug the power the monitor and let it set for 5-10 Minutes to drain off any residual voltage. I just repaired a FP7317 with the same problem. I cleaned up bad soldering and there are 2 small transistors that are marked 2N7000. on the end of the circuit board where the lamps plug in. The are N Channel Field Effect Transistors that are for high speed, high voltage switching. One of these went open on the monitor,I replaced the pair of Transistors and it's now working fine. There's a monitoring circuit on the power supply for backlights, whether it be on a Monitor or LCD TV. If one output to a lamp goes out, the comparator senses it and shuts all the outputs down. This is known as "Protection Mode" Had the same thing happen on a 32" Funai LCD TV. It was given to me and I replaced a $5 transformer and now it's working well. I also changed out the Electrolytic caps in the power supply while I had the board out just in case one of those let go later on. The monitor worked with just the transistor replacement though. Good luck, I hope this helps.

Posted on Oct 29, 2009


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