Re: Dell E153FPb failed transistor replacement

Yes I did resolder the transformers. There are some good articles on the net and they recomended doing it. The monitors are in use and still working fine

Re: Dell E153FPb failed transistor replacement

Hello Bobdee,

Thanks for your reply which was just the tonic. I looked again and would you believe I had soldered in Q739 in the wrong way in both monitors! In one monitor just swapping it around fixed it but in the other I to replace Q740 which either was already faulty or had not survived my idiocy.

On the Q759, Q760 pair they are metal side facing metal side and I just copied that with Q739, Q740 but on closer inspection the board is labeled Q759 ECB, Q760 BCE whereas the other two are BCE BCE. I think...

Hello, this is my first post to this forum

Having read about replacing the transistors Q743, Q739, Q740 and Q751, Q759, Q760 and resoldering the coils T752 and T751; I have possibly done something wrong because... Q743 gets immediately very hot to touch and I think the fuse would go if I didn't turn the power off.

The Q751, 759, 760 part of the circuit appears fine because when I remove Q743 all is well and the power LED lights up fine. The screen lights up and then goes off.

I have two of these monitors and have replaced T752 with no effect. I'm using...