How to fix no power issue Sony LED TV KLV-32R302B
Step-by-Step Repair Guide
A Sony LED TV, model number KLV-32R302, came to my workshop for repair. The customer said that this TV had turned off while it was running. When I checked it, its standby light was not even on. Initially, my guess was that its main power board was not working; there seemed to be a problem with the system IC or a power supply was off, so I told the customer to leave it with me. I will diagnose its fault and fix it with your permission. The customer said, “Okay, you keep it and let me fix it.”
Physical Inspection
I opened this LED TV in the workshop lab and started inspecting it, meaning I looked at its main board very carefully to make sure there was no rust or other damage to its PCB. I looked at all the capacitors, I looked at all the resistors carefully, I saw that there was no register park anywhere, and there was no rust between the pins of any IC. Overall, the mainboard was fine and in good condition, so I completed this. My advice to technician friends is that physical inspection is very important.
Voltage Testing on Mainboard
First of all, I checked the 19 volts of the main board, the main power supply source, and they were fine. Then I checked its 3.3 volts, and they were also there. Its remaining voltages, 1.2 volts, 1.5 volts, and 5 volts, were all coming simultaneously, while they
- Presence of 19V confirmed
- 5V line was active
- 3.3V supply detected
- 1.2V output verified
- 1.5V was stable
Fault finding process
Now I started checking the parts of this main board. I first started with the resistance. After a lot of searching, I found that one of its resistors was faulty. It takes the signal from the resistance and gives it to the system IC. This is the Array resistance. Basically, these resistors work as a communication signal between the system and the NAND flash. If any one of these resistors is damaged, the board will not work and the system IC will not work. I have marked the resistance that I found to be faulty in the picture. You can see in the picture which resistance was faulty. Its value was 47 ohms. After changing this resistor, my motherboard started working perfectly.
Conclusion – Fixing No Power Issue in Sony KLV-32R302B
As we saw in this case that its resistance was bad, we replaced it. This resistance was malfunctioning. The system between NAND flashes is a common fault in Sony, which occurs in all Sony sets, so let’s look at it. All parts should be checked in great depth, and you should have a good-quality multimeter that gives you accurate readings. At least the quality of the meter should be good so that it gives accurate readings.
FAQs – Fixing No Power Issue in Sony KLV-32R302B
- This is a common fault in this Sony model or similar models: the set becoming dead, so this is just one case where the resistors may be damaged.
- Or if the voltage regulator in these types of motherboards is faulty, it will still go into a set-off condition. It depends on the fault and where the fault is.
“For a detailed solution on Sony KLV-32R302C screen freezing issue, you can also check out this article.”
Shaukat Ali
Shaukat Ali is a professional Sony LED TV repair technician with over 30 years of experience. He specializes in diagnosing and fixing complex display and board-level faults. Based in Lahore, he shares real-world repair cases to help both customers and fellow technicians.