Magnavox 47MF437B/37 slight hum when plugged in no picture squeaks when turned on

[igotquestions]

Hello everyone,

This is my second thread on this website and I would like to just say that without anyone to help me last time I would've achieved nothing and would like to just thank the community for being as exemplary as it is.

Also I'd like to say that I'm very very novice at soldering and whatnot and the first experience I had soldering was my last fix. So please break it down for me in terms of a laymen. I also only have the tools located in this pack on amazon from my last fix: http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1

No Multimeter
A few inches of solder and wick with a poor solder sucker.

So to break down the issue:
Unplugged no sound or smell or anything of the sort.
Just plugged in there is a slight hum.
Plugged in and turned on the power button led turns from red to green for 5 seconds while squeaking, and then turns back to red with a slight hum.
Opened it up and the PSU has one bulging capacitor.

Read up on previous posts on the forums that diodes seem to be the majority of the problem of the make and model of this tv.

The TV is:
Magnavox Model #:47MF437B/37 serial #:BZ5A0751360493

I've also attached some pictures for better idea.
I apologize that they are poor quality as my phone is not really all that great.

Thank you for both the help now and previously.
I hope to learn some better troubleshooting techniques and such from the intelligent community here.

[igotquestions]

Re: Magnavox 47MF437B/37 slight hum when plugged in no picture squeaks when turned on

Is there something I'm missing in my explanation that isn't allowing anyone to be able to respond? Or is it just because I'm new to this and I'm in the wrong forums?

[Caleb]

Re: Magnavox 47MF437B/37 slight hum when plugged in no picture squeaks when turned on

Well since the cap is obviously bad change that first, but yes shorted ZD902, ZD904, D925 diodes are common. Although without a multimeter you will be at the mercy of a spray and pray approach. I see a multimeter in your future....

[igotquestions]

Re: Magnavox 47MF437B/37 slight hum when plugged in no picture squeaks when turned on

Is this multimeter a viable option?
http://www.amazon.com/Etekcity-Digit..._bs_15707471_3

Also, when trying to check the pins or whatnot for caps or diodes and such, does one usually need to unsolder them to get an accurate reading? Because it would be my second time soldering anything and the first time I didn't do so good haha.

[Caleb]

Re: Magnavox 47MF437B/37 slight hum when plugged in no picture squeaks when turned on

Ive never heard of that one before but it has gotten enough good reviews I think it will do what you need without breaking the bank.

I test diodes (and most other components) on board without unsoldering them, after I find any that read bad I lift one leg and retest. Sometimes the diode acts as a snubber in parallel with a low resistance resistor and will test as bad in circuit but is just fine.

As to your soldering find an old piece of electronics you dont want to fix and use it to practice desoldering and resoldering. Tin your tip well and add a little new solder to the joint the flux will make it easier to flow the old solder. Check out some videos on youtube on soldering and testing diodes

[igotquestions]

Re: Magnavox 47MF437B/37 slight hum when plugged in no picture squeaks when turned on

Thank you for the assistance, replaced the capacitor leaking the electrolytic fluid and changing I think 925 diode solved the problem just fine.

[Caleb]

Re: Magnavox 47MF437B/37 slight hum when plugged in no picture squeaks when turned on

Glad you got it working, and thanks for the feedback.