Today we repaired a couple of LCD Monitors, Fujitsu Siemens Scenicview A17-2 that came into our shop from a regular customer. They all had a described fault by the customer: Turns on and then turns off after a few seconds, normally two seconds. Both LCD´s have the same problem.
So as usual, first thing to do, besides testing it for yourself and confirming the fault. Would be to open it up and take a look inside. Always Use extreme caution when managing the internal boards, because even when powered off, that main capacitor can bite pretty badly. I personally use this little (4K7 – 5% – Ceramic Resistor)
So now we took a look at the power board and we were expecting a lot of Blown Caps, but it appeared that there were only two bad caps, as shown below.
We tested the two bad Capacitors with our Peak Atlas ERS+ ESR70, and just as expected it showed “Leaky” and a High ESR Value.
To Resume up the repair, all we had to do was to desolder those two 1000Uf 25V Capacitor with two new 1000Uf 35V Caps… The problem was the same for all of these LCD´s that we received… So after a few hours testing these old Fujitsu Scenicview A17-2 everything was fine and dandy.
Tip of the Day: When testing caps, we always test them removed from the board, even though the ESR70 is made to test capacitors “in-circuit” , we find readings to be much more accurate when they are no longer soldered to the board.
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