Having problems with your Dell E173FP 17" LCD Flat Panel Monitor ?

Dell E173FPs LCD screen (4 years old) is blank, power button is blinking green. I have read numerous articles about the same problem on similar models (E173FPc?) caused by poor solder connections at certain transistors and transformers. The solution recommended is to replace 4 transistors and re-solder the transformer connections, but my circuit board does not have these transistors (may be newer?) Does anybody know of a proven problem/solution on the Dell E173FPs? I have the thing in pieces and


Answers :

Replacing transistors would be the last thing in that troubleshooting. First, check all electrolytic capacitors if there are any of them "bubbled", replace those. Next, if there is the fuse used for supplying DC voltage to the inverter area, take it off and check if LED will still blink as before. If there's no such fuse, you can cut the trace, supplying DC voltage to the inverter, another words, you need to unload inverter from power supply and check LED behavior then, if it will stay steady, then next steps will be to troubleshoot the inverter, otherwise, using ohmmeter ring all capacitors and diodes in the power supply part, especially connected to PWM chip at primary side of pulse transformer. By the way, what kind of chip is there?
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