Magnavox 37MF231D/37

[Freezer]

A few weeks ago I was at yard sale and they were selling a broken 37" flat panel TV (Magnavox 37MF231D/37). The screen was fine (no cracks), so I suspect the problem is power board related. I talked them down to $10 which seemed like a good price to me.

The back comes off pretty easy, just a bunch of screws around the edge. Once open, a few more screws and you can release the cage holding the power and video boards.

After removing the power board I see one obvious problem. Cap C2074 (2200uf/25V) is bulging. The power board only has 7 caps (not counting the big fat one), and they are all CapXon board. so I just ordered replacements for all of them. Before ordering replacements, I also checked the video board. To my surprise, it only had 2 electrolytic caps - both of which tested fine. And lastly I checked the two inverter boards. They each has 3 caps, they tested fine plus they were good quality Rubycon. So in the end I only recapped the power board.

After soldering in the replacements the TV powers up and works perfectly. So $10 for the TV, and less than $5 in caps. Not bad for a good looking 37" flat panel TV. I wish all TVs and monitors were as easy as this one to work on.

[budm]

Re: Magnavox 37MF231D/37

Yep, people throw away TV that can be fixed by DIY. The shop could have charged about $80 and will still making profit.
Good job.

[tieny]

Re: Magnavox 37MF231D/37

I wish I could get a cheap bad cap TV. Out of the dozen of tv's I've worked on, not one of them has had bad caps as e problem

[ricosavy]

Re: Magnavox 37MF231D/37

how do you test inverter on these

[sam_sam_sam]

Re: Magnavox 37MF231D/37

After removing the power board I see one obvious problem. Cap C2074 (2200uf/25V) is bulging. The power board only has 7 caps (not counting the big fat one), and they are all CapXon board. so I just ordered replacements for all of them. Before ordering replacements, I also checked the video board. To my surprise, it only had 2 electrolytic caps - both of which tested fine. And lastly I checked the two inverter boards. They each has 3 caps, they tested fine plus they were good quality Rubycon. So in the end I only recapped the power board.

After soldering in the replacements the TV powers up and works perfectly. So $10 for the TV, and less than $5 in caps. Not bad for a good looking 37" flat panel TV. I wish all TVs and monitors were as easy as this one to work on.

I also found a 32" in a trash pile by street and it had one bad cap on the 5 volt power supply which I had the cap for it ran for a year like that unit it started having some problem again so I recap all the caps in it this year and works real good again

I love it when a plan come together

[tibimakai]

Re: Magnavox 37MF231D/37

I'm off topic, sorry about it.
Could you please give me the panel part number?
Thank you in advance.