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Fixing a Dell E172FP1, E172FBP, E171FBP, E173FBP by Brett

Our monitor to fix today has a black screen and forever blinking power button LED. This one wasn’t mine, but I was slightly concerned since I own three of them! Some poking around on the internet later, I found the 2C5707 transistors on the inverter driver were commonly going bad. So, one by one, I plucked them from the board and tested them.

CIMG8715Sure enough, one out of four was bad. I couldn’t find the reason they went bad, so I’ll just have to chalk this one up to defective parts. Lowest bidder wins. I looked up the part in a few catalogs and found a supplier that had them at a pretty good price after shipping. Since they were all out anyway, I decided to replace them all. The total was under $12- cheaper than a new monitor I suppose!

Few days later and a small brown box is at my door. I plugged in the irons and ripped open the package. 10 minutes later:


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