I want to replace two capacitors in my LCD TV. The TV starting buzzing on dark colors, etc.
Now it started cracking and buzzing really aggressively so I opened it and found two bulging caps. I have disconnected the two internal speakers for now, which has killed the noise, but I need to replace the caps ASAP.
My question is this: When it comes to replacing caps, you can go to a higher voltage rated cap but have to stick to the same farad rating?
The bad caps are both 6.3 V, 4700 µF and i was thinking of replacing them with 16 V, 4700 µF but getting the better quality 105 °C rated one as the others ones are 85 °C rated.
Just wanted to double check before I damage my TV.
Best Answer
Yes, you can pick a higher voltage without problems.
Again, yes, 105°C will last longer.
HOWEVER:
These caps are most likely at the output of a switching power supply (please check). In this case, you will have to use low-ESR (or low-Z) models rated for this use.
Consider Panasonic FC-FM-FR, Rubycon ZL, for example, but do not use "general purpose" caps in a low-Z position.
Also, please make sure the capacitors fit in the holes. Don't connect them with wires or stuff like that, as the extra inductance could increase HF ripple from your switching supply.