Mobos faulty and I suspect its the capacitors by the CPU because I hear a high hissing noise. How do I check the capacitors if theyre faulty or not? Also are the capacitors replaceable? Im fairly decent with soldering.
2007-08-24 14:50:56 · 5 answers · asked by Anonymous in Computers & Internet ➔ Hardware ➔ Other - Hardware
my guess is if one component fried then more than one fried .. i would just replace the whole thing .. im sure u could order some caps online if u get the specs off of them theyre probably printed on the side if u want to mess with it ... the caps are probably the barrel shaped electrolytic and u need the farad rating and the volts to get the right ones ..
2007-08-24 14:56:38 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Caps are very inexpensive and replacing them is fairly easy, so it wouldn't hurt to try. It's already broke, what harm could you do! Make sure you get the right voltage & farad rating, and don't forget to observe the polarity when you put in the new one.
As far as checking a cap while it's on the mobo; when you put a resistance meter to check for a short, you will read back through all the other components on the board... same thing if you have a capacitance meter. One way to do it is to clip one leg of the cap, pull it away from the board, and then measure. However, a cap can measure good when testing, but it could leak once it has the operating voltage applied to it. So replacing them is a good option.
If the cap went bad there could be other damaged components, but it's worth the buck to try your fix.
2007-08-24 22:19:14 · answer #2 · answered by Christopher 3 · 1⤊ 0⤋
You set your multimeter to resistance measuring (this forces the meter to emit current to the capacitor) and the capacitors internal resistance drops shown as a decending number on the meter, then you switch to a low range in the DC Voltage on your multimeter if you are at zero or very near zero (.01 volts or less) you need to either replace that capacitor with a equavelent or you need to replace the batteries in your meter. Some motherboards now use surface mount technology for caps so you may need a very precise soldering pencil this is done by robots at the factory.
2007-08-24 22:00:39 · answer #3 · answered by silencetheevil8 6 · 1⤊ 0⤋
Testing the cap while on the board will not be possible as you'll back feed through the other components. The only way to get an accurate reading is by removing the cap. This can get tricky as many of the caps are SMD devices and you might not even be able to identify them.
2007-08-24 22:12:07 · answer #4 · answered by Mark S 2 · 1⤊ 0⤋
You'd have to remove them to test them. Any good Fluke will have a capacitance meter.
2007-08-24 23:56:32 · answer #5 · answered by Nomadd 7 · 0⤊ 1⤋