Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

[Krondorf]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Panasonic

[texski]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

I know this is an old thread, but could someone recommend quality caps for this repair? I have had good luck repairing my Pioneer Elite, and want to try my monitor. We have a Mouser nearby.
Thanks!

[selldoor]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Hey. we usually like a "real" challenge.
It still looks a bit messy - take the old cap out and remove as much solder as you can then with an old toothbrush or similar brush the are with some isopropyl alcohol, then post another picture. If you get a new cap it looks like the legs will be long enough to reach the next joint. If you want to use the old one then straighten the legs and put it back in securing it to the board with the good leg. Tin the bad leg. Get a wire and make a loop in it to fit over the leg and long enough to reach the next joint. Solder the loop to the leg, slide on a piece of insulation if required then solder the other end of the wire to the next joint.
I think you should be aiming for something like the attached.

[Mr Bill]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

You have 2 options before getting another power supply.

1)You can solder a wire from the caps leg to the point you were trying to strech the leg to.

2)Take a razor blade, small screwdriver, something sharp and very delicately scape the trace to expose the copper and make a pad and solder to that.

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Oh, man. You guys don't want to see this haha. I surrendered and just started gobbing solder trying to get it to stick to the board. No luck. I sucked it all off for the picture. It's toasted.

EDIT: Also, I had tried to stretch the cap lead to the next point as you can see.

[selldoor]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

I am not sure if this is even repairable at this point

If you post good clear pictures of each side of the damage area we can
suggest if it is repairable and how.

[retiredcaps]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

However, the 2.2uf capacitor (green in the picture) is loose from the board. The board is actually split in that area from trying to remove the old cap from the silicone/paste (whatever it is). I am not sure if this is even repairable at this point without just buying a new power supply.

You can run a jumper cable from the cap to the next component that has continuity to it. You do need a multimeter though to verify which component you can run the jumper wire to.

Something like this

http://www.circuitrework.com/guides/6-1.shtml

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Update: I think I found the problem. I regretfully do not own a multimeter so I can't get you those readings, retiredcaps. However, the 2.2uf capacitor (green in the picture) is loose from the board. The board is actually split in that area from trying to remove the old cap from the silicone/paste (whatever it is). I am not sure if this is even repairable at this point without just buying a new power supply. Thanks everyone for your help. I will go cry now while I try to find the Chinese Ebayer with the highest rating

[retiredcaps]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

1) IC802, IC601, and IC702 are voltage regulators on the main board.

2) When the lcd is working, measure all 3 regulators. If you can't get all measured with 30 seconds, keep powering on/off until you do.

3) Set your multimeter (if manual range) to 20V DC.

4) Put your black probe on a ground screw. Leave it there the entire time. This is your ground.

5) Put your red probe on each of the pins including the "cut" pin, but ignore the "fat" tab. The fat tab is "up" or "north". Number the pins left to right.

6) You should have 3 readings per regulator (5 for IC702)

7) Report them like so along with the part number (include all lines on the IC) of the IC.

IC802
1084-33
pin 1 = 0.0
pin 2 = 3.3
pin 3 = 5.0

8) Repeat the above measurements when the lcd is NOT working (i.e. no power LED on). Report your measurements.

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

here you go!

[retiredcaps]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

And the main board? The one where you plug the VGA, DVI cables into?

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

first 2 - with flash
last 2 - without flash

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

I've been at work this whole time. I will get you the pictures when I get off.

[retiredcaps]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

The monitor now comes on for about 30 seconds and then shuts off completely and won't turn back on.

I doubt there is any image being displayed, even faintly since the power light isn't on after shutting down.

Take it apart, leave it apart. Power on and see if it goes off after 30 seconds. If yes, get your multimeter out and there is voltage on the main board (still waiting pictures of all your boards in my preferred format as in post #3 - I don't ask a 3rd time ever).

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Correct. The monitor now comes on for about 30 seconds and then shuts off completely and won't turn back on. It seems to turn on only the first time after reassembly, like it's resetting somehow when I take it apart. This has happened twice. I have not powered on the monitor without being fully reassembled. I've completely put it back together every time before connecting power to it. The backlight shines brightly for the time it stays lit and the picture looks great. I will make sure none of the components are touching the metal housing, but I don't think they are as they are the same height as the previous ones. I will inspect the on/off cable when I get home. I doubt there is any image being displayed, even faintly since the power light isn't on after shutting down. I will check that as well though just to make sure.

The 17" Dell LCD works. It's just very old and has nonadjustable, crappy backlighting.

[selldoor]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

It may depend on the problem. Often if it it is the backlight or its transformer that is the problem then the power led does stay on and sometimes a faint image can still be seen on screen. Shining a flashlight on it sometimes helps to see the image.
Any working ccfl will do - is the 17dell working - I am only thinking ahead and asking what you have available in case it can help.For example If the 17dell is working it may be enough to power up the ccfls in the 216 and if they stayed lit it would illiminate them as a problem.
Just re read your opening post and your saying it shuts off totally? I dont think I have come across that before. Especially having to dismantle it to get it back on.
Are you putting it all back in the case to try it?

Two things to check - is it possible to set it up in pieces eveything connected but not in the case . boards can be kept apart using sheets of cardboard. I am wondering if one of the legs on a new cap is a bit long and is touching the frame.
Second is the on off switch on a cable and is it being trapped or has it become damaged?

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Oh, sorry. I do not have a spare ccfl close to the size of this one that I can use. I've got an old 17" Dell LCD...

If it was the ccfl, wouldn't the power still stay on to the monitor when it goes dark?

[selldoor]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Joint doesnt look as bad in this pic - but you should check all the factory joints.
You didnt say regarding the spare ccfls/monitor
I would still like a single picture of the top of the board and the bottom in the same
orientation I can get a feel for the layout.

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

Mouser #: 647-UPZ2W101MHD
Mfr. #: UPZ2W101MHD
Desc.: Aluminum Electrolytic Capacitors - Leaded 450volts 100uF 18X35.5 20%
1 $4.86 $4.86 1 Shipped Jul 13, 2012

Mouser #: 667-EEU-FR1E331B
Mfr. #: EEU-FR1E331B
Desc.: Aluminum Electrolytic Capacitors - Leaded 25VDC 330uF 8x11mm LS 5.0mm
1 $0.22 $0.22 1 Shipped Jul 13, 2012

Mouser #: 140-SG2R2M1H0407P
Mfr. #: SG2R2M1HBK-0407P
Desc.: Aluminum Electrolytic Capacitors - Leaded 50V 2.2uF 105C 4x7mm
1 $0.36 $0.36 1 Shipped Jul 13, 2012

Mouser #: 140-RXJ470M1HBK0611P
Mfr. #: RXJ470M1HBK-0611P
Desc.: Aluminum Electrolytic Capacitors - Leaded 50V 47uF 105C 6.3X11 mm
1 $0.52 $0.52 1 Shipped Jul 13, 2012

Mouser #: 140-RXJ220M1HBK0611P
Mfr. #: RXJ220M1HBK-0611P
Desc.: Aluminum Electrolytic Capacitors - Leaded 50V 22uF 105C 6.3X11 mm
1 $0.33 $0.33 1 Shipped Jul 13, 2012

Mouser #: 667-EEU-FR1E821B
Mfr. #: EEU-FR1E821B
Desc.: Aluminum Electrolytic Capacitors - Leaded 25VDC 820uF 10x20mm LS 5.0mm
5 $0.44 $2.20 5 Shipped Jul 13, 2012

[Downward_Spiral]

Re: Samsung 216BW SyncMaster Monitor. Cap replacement didn't fix

I took a few more pictures. I'll post the exact capacitor statistics once I get to work.