LCD Monitor Fujitsu Siemens P15-1A, no Power

Today we received a Fujitsu Siemens Scenicview P15-1A, with a “no Power” Symptom.

Fujitsu Siemens P15-1A
Fujitsu Siemens P15-1A LCD Monitor – No power on – Backplate – Rearview

So the 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)

4K7 Ceramic Resistor
Discharge Capacitors With 4K7 Ceramic Resistor

After everything is discharged, we took a close look at the board to look for any signs of Blown Capacitors, discoloration from heating, or anything out of the usual. In this case we found two slightly blown caps, and tested then on our Peak atlas ESR+ (ESR70).

71511063-1a Power Board
View of blown Capacitors on a 71511063-1A Power Board
Peak Atlas ESR70 ESR+
Testing a Blown Cap on a Peak Atlas ESR+ ESR70

After testing the usual componentes such as the main fuse, the diodes and the main Capacitor, all was ok, the only two capacitors that where tested and came up as “Leaky” and high ESR were those two (1000Uf 25V). After desoldering those and soldering new ones, this old Fujitsu Scenicview P15-1A came back to life and spent 5 hours testing to ensure that everything was perfect.

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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Thanks for reading.

 

 

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