Today we repaired a LCD Monitor Fujitsu Siemens Scenicview A17-2 that was dropped off in our shop. This particular LCD had a described fault by the costumer: No Power, Doesn’t Power On, or no Picture.
We connected it to a power outlet so we could confirm the described fault, and the problem was: No Power, nothing, not even a power on led indication.
I do not want to be repetitive, but safety is always an issue…. 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)
Taking a look inside and we found a lot of issues with this one, you can even see the discoloration on the bottom of this board which shows the hours of use that this LCD has been put through. The Componentes that we found faulty on this Power Board (P/N: 3bs0101313gp) were 7Caps, one fuse and one Power switch. We started by changing the a Blown Fuse, and replaced it with a new one (250V 3.15A), This Power Board had also 7 Blown Capacitors, (1 X 100Uf 400V) (2 X 1000Uf 25V) (3 X 470Uf 25V) (1 X 470Uf 10V), and finally the componente which won the blown up Fet of the year, (were we show a close up below), a Fairchild Power Switch – FSDM0565RB.
Just to confirm, we tested that Big Capacitor 100Uf 400V with our Peak Atlas ESR70 meter and the Peak wasn’t even able to detect the Cap, so “That Cap was Totally gone!”
After everything was tested and no “Shorts” were detected, we assembled it all and …Voilà.. another happy LCD working again and hopefully for a few more years. We tested it for a few hours and everything was perfect.
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Thanks for reading.