In case you have an LCD monitor power supply issue, you might think to call an expert for professional help for Samsung TV repair. However, the following tips will help you solving this case yourself:
- Know the background
The capacitors are the ones which usually go bad in LCD monitors. The result is their leakage and bulging out, which prevents the power supply from sending electricity to the monitor. Hence, the monitor does not power up even when the power button is pressed multiple times. The capacitors are the driving force in the setup of a typical LCD monitor. Their worsening is a matter of concern in lg tv repair, but the issue can be solved with focus and little expertise. Only by replacing the capacitors will the LCD work, which is why replacement is the only route.
- Material and tools
Without the right tools, one cannot solve problems related to electronics. What is more important is that the tools must be compatible with the LCD monitor’s specifications. Apart from the monitor, the following things are required:
- The right capacitor
- Solder
- Soldering iron
- Screwdriver
- A prying tool
- A solder sucker (optional)
- Disassembling the monitor
This is particularly for the Optiquest Q9B, but it can be easily understood my many people. First, remove the plastic part over the hinge of the stand. Then remove the two screws and pry the two halves apart with some shape, form, or way of prying tool. The two halves will come apart very easily. It must be kept in mind that there are lots of wires attached between the front and back halves, which must not be disturbed. The wires might belong to the speaker, and even though you might use external speakers for your convenience, it is advised to not break them. The power supply is normally covered, so remove it. Unplug the wires which go to the power supply and take them out.
- Find the bad capacitor
On the power supply, there are a bunch of capacitors, most of which look normal. The one you need to look out for has a brownish or yellowish crusty liquid oozing out on the top. It will be standing vertically, and is not difficult to spot. If the difficulty in spotting it persists, remember that the one we are looking for is the only one with the liquid bulging on the top.
- Desolder
Now we move to the technical phase of the process. Fire up the soldering iron and wait for at least a minute until it heats up. Mark the negative lead of the capacitor on the board, it will be helpful in the subsequent steps. The side which has the gray stripe on it is the negative stripe. Now, mark the capacitor which you need to take out, flip the power supply over while keeping an eye on the bad capacitor. Heat up the solder on one of the legs, and use the solder sucker for removing the liquid solder. Repeat the step for another leg. In case you do not have a solder sucker, just heat up a leg, then pull the leg a bit by bending the capacitor, and let the solder solidify again. Repeat the step for the other leg and keep doing the same until both the legs are detached.
- Find the capacitor value
Now that you have removed the bad capacitor, do not throw it away. A working capacitor needs to be placed, and it must be compatible with the electronic. Finding the right capacitor means finding the one which has the same value as the set up desires. Look at the bad capacitor and find its value. Note down the value on a piece of paper, and throw away the bad capacitor. Visit and electronics store, and ask the salesman to give you the capacitor of the same reading as the bad one.
- Solder in the capacitor
Now that you have a working capacitor with you, all you need to do is place it in the right position in the circuit board. Take the capacitor out of the packaging material, place it into the holes, making sure that the polarity is correct. Flip the board over and then solder the capacitor in the right place. It must be kept in mind that soldering is a job which must be done with care and only by an adult. Also, if the polarity of the capacitor is wrong, it can explode and destroy the whole circuitry.
