Question about HP f1905 19" Flat Panel LCD Monitor

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HP f1905 monitor problem. The monitor does not

HP f1905 monitor problem. The monitor does not turn on after going into the sleep mode. I then have to either restart the computer or turn the monitor on and off button on several times before the monitor gets a picture again.

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There are 3 low ESR Electrolytic capacitors in the power supply that fail. They are 1000uF 25V and can be replaced with RS Components opart number 315-0619

Posted on Mar 01, 2011

  • carl_watts Mar 01, 2011

    No power problem or intermittant power. there are 3 low ESR Electrolytic Capacitors that fail in the power supply. They are 1000uF 25V and can be replaced with RS Components part number 315-0619. There are 5 caps in this area so just replace all 5 with the Panasonic part.

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More likely to have dying power suppkly due to bad caps, look for that first.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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