RDENCA257WJQZ PS board with a defective IC4731. what is the part number of this IC?

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. https://elektrotricks.blogspot.com/
http://electronicshelponline.blogspot.com/
Type in the brand name of your device [exclude the model number] at the search box at the right column to get gathered related posts.
Blinking codes details to many popular brand TVs are given. If blinks continue without any pause, the main board is faulty.
Counting of number of blinks to Philips TVs is entirely different to that of other brand TVs. It is not a direct count procedure. The site have details about how to count the number of LED blinks [Fault Codes] to Philips brand TVs are given; along with details of the faulty circuit location.

Ok sounds like you need a technician to look at it due to a transformer failure. Keep me posted
Thanks,
Lee

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

ic 2374a

With all of those bad parts on PS sure there are more. Why not replace the board with a new one?

A real comman problem with that set is vertical IC will blow, burn a hold in the board itself, Part Number is a LA7838 Vertical IC, located right center mounted on a heat sink, and will about seven legs on the IC,, on defection board.Remove back and see if that IC is in pieces?

thats come from your convergence module board whers is two ic
they probly defective and the tansistor for the 40 volt regulation
they need to be replace plus a verification of the circuitry arround
it, you will need a technician to do so...
hope that will help
regards alan
PS ; i for got if its a dlp tv for got that and look for the color wheel
and the lamp,,, soory Alan

Hello sgaffar,

This may mean that you audio detector/amplifier IC in the TV was rendered defective by an electrical surge. Now I would check to see if the circuit was getting and sound from the audio detector (which might be in the IC also). After checking to make sure the bias circuits are ok I would suggest replacing the IC.

You will need a schematic, a multimeter, and if possible an oscilloscope to troubleshoot this problem.


I hope this helps,

Thank you,

Shuttle83

Thats an obselete IC. Your model came with two chassis designs the CTC195 and the PTK195 could you verify which chassis your model has and I will try to cross refernce it to a substitute part number for you. Please respond to this same post when replying.

You have a pair of defective IC. Part Number stk392-110