Question about Samsung SyncMaster 213T 21.3" LCD Monitor
I have a Samsung Syncmaster 205BW When you turn it on the blue power button lights up for three seconds and then the image will appear for no more than a 1/2 second at wich point the blue power light goes off, blinks twice and then stays on for three seconds repeating the cycle. From doing a little research it sounds like the power supply or inverter board. Does that sound right and if so does anyone know the part # for that board. Thanks, Ryan.
Hold down the power button and the auto button. if that doesn't work try the power button and the source button.
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Posted on Jan 02, 2017
SOURCE: Samsung SyncMaster 204B
Got the same problem, happened yesterday for me, Did some research and it looks like its bad capacitors in the back, check out this page for more information... i'm taking mine to an electrician to fix today... luckily he's related and should be able to fix it on the cheap...
Posted on Jun 01, 2009
I've had same problem and I fixed it!
With good CCFLs, clean supplying voltages, all good capacitors and resoldered junctions, the backlight still turns on for fraction of second and goes off.
It is in the Power Supply / Inverter board. In the Inverter part there are two dual n/p-MOSFETS U3 and U4 (models STS7C4F30L, SO-8 packages). I've found they both have too high ON-Resistance (perhaps due to age and constant overheating). All you need to do is to replace them. I've checked many models and found closest by Rds and IDcont (continuous drain current) are IRF7389, you can find distributor by findchips.com, but I've bought them at newark.com, they're cheap.
The hardest thing was to unsolder old chips, they are glued to PCB and because of overheated material under them, the copper could easily go apart. Therefore, the best is using fine tips cutters, cut off all legs one by one and then take chip body off the PCB and take legs from pads by iron. That's all you need. After that my monitor started working as new even with old CCFLs. Good Luck!
Posted on Sep 09, 2009
hello i have the same problem, there are 4 lamps (bulbs) inside the monitor when some of them falls the system turn off, cheks and good look
Posted on Oct 27, 2009
Solution for Samsung SyncMaster 2232BWplus:
The problem is bad capacitors: 5 pcs. 820microFarad – 25v and 1 pc. 330microFarad -25v. Replace these capacitors. Then re-solder the two transformers of inverter side. Also re-solder the power transformer and the inductor coil.
To open the casing:
At the bottom of the stand just twist the knob to unlock. Then, use a small flat screw driver beginning from the bottom (left or right) then using a hard credit card (or alike) then slide/glide it in between the cover plastics.
Triangle Tech Whiz
Posted on Jan 07, 2010
rcpips, You may need to replace one or possibly 5 -8 aluminum can "electrolytic filter capacitors" on the "switch-mode-power-supply/CCFL inverter board. If, as you say "works for 5 or 6 seconds" then that means that fuse is good. Another thing you will need to inspect SMPS board for is "cold" "frosty looking" solder joints where the components (surface mount or through hole) are soldered to the copper circuit traces. May need large magnifying glass or low power inspection microscope to locate them. Resolder any that look bad or loose. Some solder joints have thinner than "hair" thermal fractures that can also cause YOUR TYPE OF SYMPTOM!! PARTS: digikey. mouser. newark. and possibly Radio Shack. If buying filter capacitors, make sure they are rated 105 deg C only!! NOT 85 deg C!!! If caps need to be replaced (swollen, leaky) be sure to tell us the brand name you find installed on your unit! CAPXON, ELITE, JUN-FU are just 3 that you don"t want to find in your unit. BAD news if you do!! If DIY suits you, remember to document with "close-up" digital stills your unit tear-down, so you can reassemble unit without any "extra" parts laying on kitchen table!! Filter capacitors are polarized. You put them in + to +, - to -!!! if you put them in backwards they go BOOOOMMM!!! Hope this helps a little. lmistyrel on aim or 12fixlouie at fixya.
Posted on Jan 30, 2010
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