Having problems with your Samsung SyncMaster 932B LCD Monitor ?

I have a Samsung Syncmaster 932b LCD monitor. When I turn it on, the screen just flashes on and off, as does the blue light around the power button. I read up online and found that the capacitors on the power supply were bad, so I opened the monitor and found the power supply motherboard and I found 3 of the capacitors were bulging. I am looking to replace them, but I can't seem to find out exactly what kind of capacitors they are. The capacitors themselves have the following written on them,


Answers :

Savato321, Most black screen lcd monitor owners don't have the smarts to open up their monitors to do a VISUAL inspection of the "switch-mode-power-supply/inverter supply!!!! You're good. Now you will need to know some stuff about electrolytic filter capacitors! First, the "uf" or "UF" means micro-farad! It is just a rating given to express the storage capacity of the device. Next is the voltage rating. A 16v rating means that the capacitor should never be placed in a circuit where the voltage will exceed 10 to 12 volts DC. Your 820 uf cap rated at 25volts will most likely be in a 12 to 18volt dc circuit. Now for temperature rating. All caps have a maximum temp rating. Most clock radios, stereos, will use 85 degree centegrade rated caps. Printers,PCs,monitors, will use 105 degree C rated capacitors. Never replace with lower specification units! You can GO up but never DOWN. If 1000uf 25v is all you can get it's OK. If you can get 820uf 35v units and they are not too big and they will fit on the board sure you can use them. I would stick with the OEM design voltage rating. Electrolytic CAPS are polarized!! You must replace them + to + and - to -!!! If you screw -up they will blow-up!! The wire lead closest to the printed STRIPE on the cap will be the negative and the unmarked terminal will be the positive. If you visit www.ccl-la.com/badcaps.htm you will get more info on recapping your SMPS. You can also watch some DIY videos at YOUTUBE for "lcd monitor repair" that might be helpful. Also visually inspect the SMPS/inverter printed circuit board for "COLD" FROSTY looking solder joints. They should all have near mirror finish to them. Let us know the name of the BAD CAPS you remove from your unit. You may even want to document with pics with a digital camera what you find. Well, good luck guy. 12fixlouie
I'm having a similar problem with a monitor at work. I opened her up and found 3 "puffy" or bad caps. After removing them from the board and ordering the correct ones from eBay, I noticed that there were 2 x 820uF 25v capacitors and 1 x 470uF 25v capacitor. My dilemma here is I didn't mark or notice which slot on the board the 470uF capacitor resides. The slots on the board are labeled C316, C112, and C113. I was hoping maybe someone knew more about where this 470uF capacitor might go. From simple common sense I feel as if it should go into C316, only because C112 and C113 seem to have close numbers and may be paired that way. Hopefully someone can shine some help on my situation. Thank you!
Repair Help & Product Troubleshooting for Samsung SyncMaster 932B LCD Monitor

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