Last week my LCD starting acting funny. It would turn on for about 3 seconds and then turn off. I read the posts on here about bad caps and I ordered the complete set from LCD alternatives.com. I changed all the capacitors on the power board except the biggest one. I put the tv back together and it immediately turned on! Great! So I thought. I went to change the channel with the remote and noticed that the led on the power unit was not green. The remote does not work, I confirmed that the remote is good because I have another Phillips tv in my living room. Everything works on the tv except the green/red led on the ir board. I purchased a new ir board for $1.51 online thinking that would fix it. It did not. I'm lost here, please help!
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Re: Phillips 42pfl5432
Likely you fixed some of the voltages, and screwed up others (perhaps the 12v from the power supply works , but not the 3.3v now). Have you measured the voltage of all the wires from the power supply to the main board and confirmed they all are within 5% of voltage written on the power board next to the connector?Fixed so far 12 lcd's , 1 plasmas, 5 monitors, 0 dlp's (plan to keep the dlps at 0). and 3 atx power supplies, and 2 motherboards. -
Re: Phillips 42pfl5432
I checked the 24v and 12 volt power coming from the Power Board. That all seems to be good. There supposed to be a 5v standby voltage on Pin 5 of the IR connector and it is not there. I checked the scaler board FB350 where the 5 volts is coming from and it is there. I think I'm getting close but I still feel lost.Attached FilesComment
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Re: Phillips 42pfl5432
I think the problem is in the mainboard. Replacement will be costly.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Phillips 42pfl5432
Main board as in Power Board? Or Scaler Board? What makes you think that the board is bad?Comment
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Re: Phillips 42pfl5432
So if you take the reading at all 3 pins of the IR sensor, you do not get any reading at all?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Phillips 42pfl5432
I haven't tried that yet, I will try tonight. The Power LED light is not coming on either.Comment
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Re: Phillips 42pfl5432
Have you noticed that you also have several bad caps on the main board in the first picture? They may very well be the cause of no 5V since there are DC/DC converters near them. Look to the right in the picture (I spot at least three).Last edited by imp; 03-06-2013, 12:01 PM.Comment
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Re: Phillips 42pfl5432
At least 3 caps on the main board have domed tops, C218, C807, C812.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Phillips 42pfl5432
Two of them are for the speakers, the other one I'm not sure, but they all look like CapXon... UGH...!Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Phillips 42pfl5432
I will try to replace them this weekend. Does anybody have the part numbers for them?Comment
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Re: Phillips 42pfl5432
We can give you recommendations but you have to provide us with their ratings (voltage, capacitance, series and brand). ALL Capxons should be replaced and preferably even the Elite's.Comment
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Re: Phillips 42pfl5432
Ok, just a quick update. I changed all of the bad capacitors on the main board. Tv does the same thing. It powers up fine when you press the power button. I am still not getting the Red Led or Green Led lights on the IR Board. The Ir does not work either. I am really lost here. Any ideas would be greatly appreciated.Comment
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Re: Phillips 42pfl5432
Do you get any voltages on the main board where the IR board connector is? It's unlikely for the IR board cable/connector to be bad, but I would start from there anyways.
Also, which capacitors did you change, just the bad ones?
About 9 months ago, I worked on a friend's Magnavox TV that would not turn on. Since Magnavox is just a Philips in disguise, the TV had a similar main board to yours (a DL 715T2294-3). It had bad caps too, though in different places. Therefore, I suggest you replace all of the capacitors and not just the bad ones. The only ones you can leave are the SMD ones - those are too costly to buy and too hard to remove and they don't go bad very often.
Another thing I suggest you do is to verify the output voltages on the main board. Those round blue inductors that have "100", "150" and "330" written on top of them are all filters for the various voltage rails on the board. If the internal layout of your main board is anything like mine, one of these inductors should be connected to 5V (actually, in the case of the TV I fixed, there were two 5V rails - one for the main board ICs, and one for the build-in DVD player).Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
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Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"...
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