Question about HP Pavilion F1523 15" LCD Monitor

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Monitor goes black immediately after waking from sleep, at the same time the power light changes from green to yellow. Image is just visible on black screen when viewed with a torch, After a wait of about a minute, the power can be switched off and on again, and the monitor works as normal. If the power to the monitor has been turned off, when it is turned on again the monitor goes through a cycle: power light goes green, something inside emits a squeaky beep, light goes yellow, waits a few seconds, repeats about 15-20 times, then light stays yellow until the power is switched off and on as above.

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Common problem in this model is bad DC filter caps, that will be the first place to look.
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.

Posted on Sep 01, 2010

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