I did have already a hot air reflow station and I purchased a large nozzle . I have read , on some post what temperature was used to reflow the same kind of CPU after the heat sink was removed. Used some liquid flux on the 4 side of each CPU and set the temp at 350F. For a couple of minutes I kept the nozzle at about 2 inches. After 2 minutes I brought the nozzle closer to about 1 in for 3-4 minutes. After that I brought it back up to 2 inches for a total of 8-9 minutes. That seemed to do the trick. I understand it maybe not be a final / permanent solution, but for now I proved that no other...

Hi all again.

I was able to generate the 12V for the T-Con on the main board. I was able to find a datasheet for the mysterious IC listed above 5358A.The actual part is G5358A ( High Efficiency 4A Synchronous Buck Converter )
made by some company in Asia. See attached datasheet​.( ) It appears that on the main board there is the same regulator producing 5V.(input is 19V from PS) According to the datasheet, there is EN pin (#5). This pin is connected to the CPU by one resistor (16.5K) on the other side of the board. I placed the same resistor on location R7018 This connection...

This is a better image of the component in question ...

Hi All
I was able to revive the main board by removing the huge heat sink and reflow the 2 CPUs. Now the On/OFF signal to power supply is at 3.3V when the power button is pressed. The backlights are turning on but no image on the screen. I figured out the there is no 12V on either side of the FUSE on the T-Con board. This voltage comes from the main board. No shorts on the main board for 12 V but it looks like the voltage is generated by this IC U713 on the back side (Q503 5383A are the markings on the IC). The output of this IC, is exactly where the Ref. Des. U703 is located in the image...

Received a replacement board today. I could not wait to plug it in and see my TV turn on. Unfortunately the same behaviour remained. StandBy LED turns on and fades away and the OFF/ON signal at power supply board never goes HI/ 3.5 Volts. Am I missing something?

as of today ...TV is still running...It is a big mystery....