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Substitution For C5707 Transistor Use In Dell LCD Monitor

By on August 15, 2007

 dell e173fpb lcd monitor

If you repair Dell LCD Monitor (E173Fpb and etc) you would know that most of the power blinking problem was due to a shorted C5707 transistor. This transistor is located nearby the high voltage transformer and when it have dry joints, the push pull transistor C5707 would go shorted. If you want to replace this transistor, you have to replace the other one also (because it comes in a pair to switch the high voltage transformer). The question is if you can obtain the original part number then it would not be a problem for you but what if you can’t get one? As for me i could source this part locally. If you can’t get the original part then the best is to get a substitution part number.

This morning while spoke to one of my repair friend in Miri Sarawak, he told me that he used C3303 as a substitute for C5707 transistor! I personally haven’t try it out but at least for those who do not have the original one can test and see. The spec for C3303 is a little bit lower than the original one but my repair friend told me it works! That’s the good thing about knowing lots of repair friends out there or in the market.



  1. admin

    February 13, 2012 at 11:17 am

    HI Shaukh,

    Thanks but the c2794 is only rated as 2 ampere 60 volt and the original one is 8 ampere. Try burn in longer and run on high resolution.


  2. john

    December 17, 2017 at 9:27 pm

    hi sir ihave lcd dell monitor i already replaced the 2 shorted transistor c5707, high voltage transformer then blinking light was gone but after a few seconds the c5707 was shorted again...what can i do for this problem.

    • Jestine Yong

      December 30, 2017 at 10:35 pm

      Hi John,

      Usually when the transistor is shorted the cause was a dry joints in the high voltage transformer. I suggest that you check also the components that is link to this transistor.



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