Samsung 953BW LCD monitor repair

 

Generic monitor image

 

We have come across many broken 953BW Samsung LCD monitors. In most cases, they would not turn on, or would turn on and flicker, then power off. We've discovered that this is usually the result of bad capacitors in the power circuitry.

With a prosumer-grade soldering station and an experienced level of soldering skills, we've been able to make easy work of the repair. With limited skill and a cheap soldering iron, it is possible but difficult to fix these monitors.

Disclaimer: We do not accept liability for anything you attempt after reading our guide!

For a basic overview of how to fix broken LCD monitors, check out our main page.

 

Disassembly of the case

The first part of the repair process is to open the plastic housing and remove the metal plates so as to get at the logic board. This can be difficult! Much of the disassembly process involves holding onto layers of detached plastic that are hanging on by a wire or a clip.

The front bezel/frame attaches to the back by a series of internal plastic clips. To unclip them, you have to pry apart the plastic parts at the seam, then hunt for the clips and press something into them until they let go. If you use something too wide or pry too much, you'll dent the plastic at the seams, so be careful.

Lift off the front outer bezel. Things will prevent you from getting it off entirely.

The cable that goes to the front panel

The wire in the lower left section of the back side connects the front panel to the logic board. Untape and disconnect the wires.

 

The front bezel is now gone, and the wire.

Remove the entire front bezel, and then unplug the display panel cable in the upper right corner of the back side. Remove the thin metal cover on the left side.

 

The backlight wires on the left side

Disconnect the backlight wires on the left side. You ought to mark which way they plug in so you don't reassemble them backwards. We marked on the metal next to the blue wires with a blue permanent marker.

Remove the LCD panel from the case and put it somewhere safe.

At the bottom of the picture, you see the square where the stand is attached. Jam something into the stand clip (the small copper square) to unclip and take off the stand.

 

The logic board inside the metal plate

There are two boards on the back of the smaller metal panel. On the left is the display board, and on the right is the power board.

If your LCD monitor displays odd pictures, you may want to inspect the left one. Unscrew the black screw and unplug the wires leading to the power board, then remove the board.

If you're not able to keep your monitor turned on, you'll want to check out the right one. Unscrew the two black screws, and the silver one that holds on the ground strip. Remove the ground strip, unplug the wires from the left board, and then remove the board.

 

Model number printed on the logic board: IP-35155A

The board we removed for most of these photos has this label.

 

Diagnosing the failure

Once you have the board in your hands, you will need to identify the failing parts. In all of the monitors we have repaired, the capacitors in the power circuitry were bulging or leaking.

Top view of the logic board

Above, you can see the five blue caps at the bottom of the board.

 

Bulging caps on the board

Here, a side view shows the tops venting and bulging.

 

A capacitor bulging out the bottom

On another board, you can even see the cap being forced off the board by the bulge on the bottom.

 

Replacing the components

Now comes the fun part. The old caps need to come off and you'll need to acquire their replacements and install them. When you buy, you'll need to mind the voltage and the Farad ratings written on the sides of the caps. They're not all the same.

You won't find most of these caps at RadioShack. Either your local hole-in-the-wall electronic components outlet will have them, or you can order them online from BadCaps.net or Ebay.

 

Once you have the new caps, unsolder the old caps one at a time and replace them with the new ones. This way you won't forget which one went where. You'll want to check that the new ones will fit in the space and are not too tall or the board won't fit back into the case.

 

Replacement caps on the board

Our new caps look much better!

 

Reassembly

Once you've got that all taken care of, simply reassemble your monitor as you took it apart. Leave the stand and the bezel clips off for now.

 

 

One everything else is back together, test your LCD to be sure it is working correctly.

 

Monitor test image

If your LCD stays on and displays this picture (or whatever you plugged it into, which you ought not to do while you're testing it), you win!

 

Stand being placed inside monitor base

Now reclip the front bezel clips by pressing the sides together, and reattach the stand by simply shoving it in the hole until it clips. Here we have taken the stand apart, so the base is not visible. Be sure you stick in in the right way around!

 

You have now saved $150+ in LCD monitor with $5 in parts and some effort. Yatta!

 

Let us know what you think.

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