I have a Mitsubishi VS-4543 that has no power at all.
The main cause of this power up problem are bad capacitors on your power if the capacitor is bad. They are always bulged or leaks capacitor.
Now, if your LCD set is still under warranty I would suggest to use it and let the professionals handle the problem for you. But for the rest of the LCD TV owners that their warranty had expired and want to save some money, this would be the best route.
Here's what you need for this problem to be solved ,Screw driver, Soldering iron(40watts+), Desoldering braid, Soldering wire, and capacitors.
Now lets talk about the specs, capacitors hold 3 important value:
1. The capacitance measured in uF(micro farads) (ex. 2200uF), 2. Voltage (ex. 10v), 3. Temperature (ex. 105°C)
power supply capacitors has 10v installed on the board and it is attached to a 12v bus which is causing to bulged. its going to get bigger or burst. And that's why our LCD sets end up with bulged or leaked capacitors)
Look at the bad capacitor and get the right information from it, remember uF, voltage and temperature. Mine, I only change 2 capacitors. It needed two 2200 uF, when I first saw my power supply it was really easy to spot the bad caps. Some LCD owners did went ahead replace all the capacitors on the power supply to make sure. I would not recommend changing all the capacitors because to me it was time consuming
Few things to take note, always make sure you have the right polarity. Negative part is where the colored stripe on the capacitor. If your looking at the image above, it would be the copper colored stripe. And if you are looking at the two connector wire of the capacitor, the negative wire is the short one. On placing it on the board make sure negative to negative and positive to positive. By this time you will be ready for soldering.
Hope this help in solving the problem.....
Oct 01, 2010 |
Mitsubishi VS-4543 45" TV