Question about Philips 23PF9945-37 23" Flat Panel LCD Monitor
I have a Philips flat TV HD monitor (used mostly as a computer screen), model number 23PF9966/37. I was online a few days ago when the power went out. It came back on a few minutes later but my screen had this weird greenish tint to it; the computer itself works fine but the colour is completely off. I already tried unplugging and plugging wires and cables, rebooting my computer and adjusting the screen settings. Any ideas of what this could be and how to fix it?
SOURCE: monitor power problem
It sounds like an internal issue, more likely the LOPT components are overheating, possibily due to dust collection causing temporary shorts, or an arcing capacitor. The randomness is due to weather conditions, high humidity more likely to monitor wil shut down, the dryer the weather the moisture in the dust would have evaporated, resulting in nothing happening, and a working monitor. I suggest trying this first:- Unplug the monitor from the outlet, and the computer, open the case, but REMEMBER! the monitor can still pack a punch even when it's unplugged from the outlet, (once the case is open, it is completely safe if you accidently brush against a metal part, but under no circumstances (unless you know what you're doing) remove the rubber cap that's either on the top, bottom, or sides of the back of the screen, doing so can result in a massive jolt of up to 20,000 volts),use a can of compressed air to blow out the dust, making sure you clean right up to the control buttons on the front, screw the case back in place, then try the monitor, if it's still the same, and unless you are a qualified electronics engineer and would like to repair the monitor yourself, I suggest you take it to a repair shop.
Posted on Jun 18, 2007
Do you get anything at all on the screen--like white writing at startup?
Even if your video drivers have become corrupt, they are not used until Windows actually starts.
It very well could be the flourescent backlight has gone bad. Can you adjust the brightness/contrast at all to see anything?
If those controls do nothing for you, then you're looking to get a new monitor.
Your monitor does have a sort of power supply for the backlight and that could be bad, but if you're not into taking it apart, then you are far better off buying a new monitor.
Posted on May 27, 2009
nice anecdote, fixing things from far is not easy, a t.v.-technician right in front of the actual screen could tell more- but they don't come for free, alas. hope that people's idea about problem solving lead up to you fixing a problem yourself - hey this here is for free - to sort wxperts, one needs feedback! thx alot
Posted on Jul 23, 2009
unique_m_m, Your LG l204WT has a possible bad "switch-mode-power-supply"/"CCFL inverter circuit" that will need to be repaired. The sound that you hear can only come from the circuits mentioned. The SMPS supplies dc voltage to the INVERTER supply and it changes it to a high voltage ac to light-up the "cold-cathode-fluorescent-lamps" (2) that are hung on the reverse side of the lcd panel you look at. You will need a tech type to investigate the units SMPS/inverter board for bad (swollen,leaky) electrolytic filter capacitors and "cold, frosty looking solder joints of the surface and through hole mounted electronic parts soldered to the circuit board. Here is cost to repair. DIY if handy with soldering pencil would be less than $20. Farm out the repair $35 to $65
More if new replacement board is required. I would certainly get on PHILLIPS case and yell and scream about their product's poor quality and short lifespan. Let us know if they give you the "bird"and a "you bought it you own it toyota" attitude. A service life of only two years is totally unacceptable! You could ask phillips if they have a refurbished unit swapout program?? Let us know what happens by doing additional comments to original posting. Bye for now. 12fixlouie
Posted on Jan 31, 2010
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