Phillips LCD Model #42PFL7422D/37

[Tayninh55]

Re: Phillips LCD Model #42PFL7422D/37

Seems like there were a lot of numbers on these boards: On the power board was 3104 303 50594 Then on a sticker was ES 730.3 002.C 0011407 and S310432848912 284912
Then on the main board: 3104.303.50842 D and 8204.004.58882 Hope these are what you need.
DISREGARD MY %6 post, I had a ribbon cable disconnected and did realize it at the time. My symptoms are still the same as in my first post.

[budm]

Re: Phillips LCD Model #42PFL7422D/37

We need the pictures of the whole backside of the TV showing all the boards and how they are connected together.
You have two power supplies, the standby supply is on the main board, and then you have main power supply that is turned on by the main board.
There are many version of this model so we need to know what trhe actual boards are being used in your TV.
http://www.shopjimmy.com/catalogsear.../?q=42PFL7422D

[dskall]

Re: Phillips LCD Model #42PFL7422D/37

What connector did you check?
Need voltages from connector that goes from power supply board to main board. Will need pin#-pin label-Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
Format:
Pin# - Pin Label - Pin Voltage standby - Pin voltage power on
1 - XXXXXXX - XXv - XXXv
2 - XXXXXXX - XXXv - XXXv
3 - XXXXXXX - XXXv - XXXv
4 - etc.

[Tayninh55]

Re: Phillips LCD Model #42PFL7422D/37

Hi,,,,,I just got back to my tv. I checked for power at the ribbon that goes from the power board to the main board (with everything connected) and found no dc voltage at any of the pins. When I plug in the AC cord, the green lights (standby voltage, I guess) come on and the blue power light comes on. Then the green lights on the main board go out, and the blue power light goes out and turns to a red blinking light of six long and three short blinks. I had my wife plug it in, and there is still no dc voltage at that ribbon with the green lights burning on the main board. What does six long blinking red lights, followed by three short red blinking red lights indicate? Thanks!

[dskall]

Re: Phillips LCD Model #42PFL7422D/37

Yes and when powered on.

[Tayninh55]

Re: Phillips LCD Model #42PFL7422D/37

Thank you for the info,,,,,,,,,,,,,,do you mean put the black lead on a ground (where a screw holds the board down) and then check each point where a wire leaves the power board thru the connectors with the red probe and record the voltage,,,,,,,,,,,with the unit plugged in?

[maxvalutech]

Re: Phillips LCD Model #42PFL7422D/37

You have standby voltage and tv is trying to turn on. You need to take all the voltages as shown near connectors on Power board and post the readings together with what the markings say e.g. ps-on etc.

[Tayninh55]

Re: Phillips LCD Model #42PFL7422D/37

Will this move my post to the top of the page?

[Tayninh55]

Phillips LCD Model #42PFL7422D/37
I have this 42” tv, Phillips LCD Model #42PFL7422D/37, when you plug it in, it shows a solid blue power light, black screen (nothing on the screen), and then makes a clicking sound for a while, then shuts down (with no power light). I thought wow, easy fix, probably bad caps. Took the back off, cannot see any visible signs of bad caps (no bulging or leakage visible). I then plugged it in and turned it on to see where the noise was coming from, could see two different places that lit up and went back off with the clicking sound, on the main board. The noted lights (on the main board) came on and off with the clicking sound. Haven't checked anything else yet. Just took “my pictures” and quit for the night. Appreciate a little guidance as I'm not trained in this field, just trying to pick up a little knowledge as a hobby. Thanks!