Question about Philips Televison & Video
You appear to have done a good deal of hunting already.
See if there is power to the inverter board after you turn on the TV. Should be about 24V. Note I do not have the schematics for this particular Philips, but I've seen others and they are more or less the same.
So first and foremost see if you have power to inverter or inverters, if they are two.
Actually even before that please make sure that "black" is "lack of backlight" as opposed to "backlight is there, but screen is black". It's easy to see that in a darker room as well as from the back side of the LCD assmebly when it's on.
We're dusscussing the case here where there's no backlight.
Measure the power to the inverter(s) with and without them being attached to the power board, i.e. make sure the power is there when they're not connected and then see if it is still there when they're connected.
Ideally, see how it changes from the moment you turn on the TV; some main boards turn off the backlight if the encounter power with the inverter, others do not.
There are few small fuses on the inverter board too, they are SMD. More often than not one of those is blown and sometimes it's without an apparent reason, i.e,. if you replace (or even short) it , the ivnerter will just work.
Most of the times they are blown for a good reason, though, and you need new inverter(s).
Finally, there is a minimal chance that a lamp or a lamp connection has gone bad. This is very tough to detect and usually is the last thing you would resort on checking,
Posted on Nov 18, 2009
You mentioned checked capacitors 951, 952, 953, 955 and are discharged ,
is these like the board you are having
Posted on Nov 20, 2009
Hello and welcome to Fixya. That sounds very typical of a bad Inverter Board. The single flash after power on of the screen points out the culprit. There are cheap places to get the inverter board, here is a link for the master. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270459657870&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en ( the link above is for a cheaper used master, with a 30 day gurantee) And here is a link to a site that carries both the master and the slave. http://www.discount-merchant.com/ProductDetails.asp?ProductCode=1049150&Click=54985 To see the other new parts for the Tv model you have, click at the bottom right of the page where it says" Additional Stock"
Posted on Nov 18, 2009
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Posted on Jan 02, 2017
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