Samsung 245BW or 2493HM?

[LAS]

Hi BadCaps list members,

I find myself back in the broken monitor game after several months of nothing to fix. This time around, it appears I have a couple of options, and wanted to hear list wisdom on what to do.

Previously I purchased a Samsung 2493HM which would not come on. I was unsuccessful in troubleshooting the problem. I suspect either the power board or possibly the logic board or both. The panel looks to be in good shape.

Just last night, I became the proud owner of a Samsung 245BW which looks to have taken a direct hit, and as a result the panel is in pieces, but the unit powers up just fine.

A quick internet search shows that the two units have much in common. They both use the same panel, as far as I can tell, and the 245bw power board can work in the 2493HM. The 245BW power board has a few weak spots, such as the three resistors and the usual Chinese caps, but aside from that, it seems to be more robust than the OEM 2493HM power board.

From what I can tell, the 245BW seems more robust and simpler, while the 2493HM has more bells and whistles, ie USB and HDMI support in addition to two mediocre speakers.

My question: which one should I try to revive? All suggestions appreciated.

[newbie1]

Re: Samsung 245BW or 2493HM?

My opinion is to use the 245BW power board and place it into the 2493HM .

[LAS]

Re: Samsung 245BW or 2493HM?

Hi Newbie,
That would be an easy thing to try first.

I'm thinking that if it doesn't work, then I'll move the panel over to the 245bw.

[retiredcaps]

Re: Samsung 245BW or 2493HM?

Since you have two non working monitors, I would go with the low hanging fruit one first. Once you get it working, then you have known good components to help you troubleshoot the more complex problem.

[LAS]

Re: Samsung 245BW or 2493HM?

That makes good sense Retiredcaps. I think I'll put the good video board onto the 2493HM first and see what that gets me. If nothing, then I'll put the good panel onto the 245BW.

And once I get a working combination, I'll get to work on the power board. I will take off all the glue, change the undersized resistors, and change out the caps to a better brand. After all, who wants to open it up again???

My goal is to make them as reliable as possible the first time because I may not get the opportunity to repair it again. For instance, a couple of years ago I successfully recapped a Samsung 2053BW. In a few weeks, I will take it to London and give to an old friend, who will then take it home to the United Arab Emirates. No chance of ever seeing that one again.

[LAS]

Re: Samsung 245BW or 2493HM?

So far, so good. I have been successful in getting the 2493hm working. I replaced a few caps - and it looks like the biggest problem was with the biggest capacitor. I have attached a photo to show what the big cap looked like. I have never seen one this bad.

Since my test, I have removed the board and now plan on replacing the rest of the caps and also the three resistors up front with 2 watt varieties.

I was also able to source a replacement screen for the 245BW, so I have high hopes of getting that one going again too.

[budm]

Re: Samsung 245BW or 2493HM?

Watch out also for commonly fail cap CM802 (.018uF 630V High impulse current cap) for the 24V power supply section.

[LAS]

Re: Samsung 245BW or 2493HM?

Budm, is it best to change that cap proactively? Does it need to be a particular variety of .018uf?

[budm]

Re: Samsung 245BW or 2493HM?

Cap made for high pulse type (they are hard to come by). I ran into many that failed later after the typical failed 68 Ohms resistors problem.
Digikey: .018uF 5% Polypropylene (MKP) 630V or higher.
http://www.digikey.com/product-detai...2122-ND/585189

[LAS]

Re: Samsung 245BW or 2493HM?

budm, I proactively ordered one of these. Will it do?

http://www.digikey.com/product-searc...ords=EF6183-ND

[budm]

Re: Samsung 245BW or 2493HM?

That is general purpose type.

This is the one I use:
http://www.digikey.com/product-detai...2122-ND/585189
I have no data on how long this one will last, cannot tell until I get the unit back and see if it failed with the same peoblem or not.

[LAS]

Re: Samsung 245BW or 2493HM?

OK, I will proactively replace with your suggestion and I'm thinking it's bound to be better than the toasty original.

[retiredcaps]

Re: Samsung 245BW or 2493HM?

I have attached a photo to show what the big cap looked like.

That green component above the two fuses looks like the glue that was originally white turned brown? You may want to remove the brown stuff as it might turn conductive over time.

Same for the blue cap at location ??803S (to the right of the big cap).

RM802 looks a bit toasty?

[budm]

Re: Samsung 245BW or 2493HM?

Yes, brown glue problem.

[LAS]

Re: Samsung 245BW or 2493HM?

An update...I was successful in getting both my 245BW and my 2493HM monitors up and running. In both cases, the power board was filled with bad caps and old glue. Glue was removed, and caps were changed. I also took out the 195A power board and replaced it with a 173A board from yet a third monitor that I bought cheaply with a broken panel.

I also took budm's advice and changed the .018 caps even though the originals were ok.

68 ohm resistors were also changed to the 3W variety. Hopefully these two board shouldn't cause any more trouble. Many thanks to all.