Re: Samsung LN26B460B2D

Hi, Just an update. I finished replacing all capacitors on the power supply as well as touched up all possible bad solder joints. Everything still appears good, voltages match the pinnout chart and solder joints all look clean. The new Main board resulted in producing the power on chime, which my old board didn't do. However, still no picture and no backlight. Surprisingly not a lot of info about these tv's on the web.

Re: Samsung LN26B460B2D



Hi,

If I disconnect my mainboard from my powersupply, the powersupply is isolated from the on/off button.(see picture) I did look at your thread and tried disconnecting the flat-ribbon to the T-conn from the mainboard. When I powered it on disconnected from the T-conn, same exact symptoms.

I also tried jumping the stby 3.5V to the on/off pin with a resistor with nothing.

What did you do to solve your problem?...

Re: Samsung LN26B460B2D



Hi, Thanks.

I'm assuming your referring to the zeners and resistor located in the middle of the power supply.The colors on the resistor are Yellow, Black, Silver and Gold(.4 ohm) and tested right in the ballpark with my analogue MM.

As for the zeners, I am not 100% how to test these accurately. But they read:

Anode -> cathode
start at 75k ohms then approach infinite

Cathode -> Anode
varies when i change the ohm test voltage, for ex:
RX1: 29 ohms
...

Re: Samsung LN26B460B2D

Hi Plain Bill, Thanks for the answer. I was able to get my hands on exactly the same Main Board on ebay. Luckily the guy was close enough and I was able to pick it up yesterday. Anyway, put in the new board connected everything up, and I heard the power on chime! Unfortunately, that was it. Still no picture or backlight. I swapped the boards a couple of times and it was consistent, that my board produced no chime and the new board did. But still no backlight or picture(tried flashlight test). The guy I bought it from said in was 100% working, but like I said...

Hey all,
I have fixed two LCD TV's, a computer monitor and motherboard thanks to this website and everyone that supports and contributes to it. I am now fixing a LCD TV, Samsung LN32B460, and haven't found any threads on it. The symptom is no power. The power led[RED] does come on, it blinks 5 times then goes out. It will however stay lit if you press it again but no picture, no sound, no back light. I opened up the back and examined the power supply. No Bulging caps, burn marks, or bad solder joints, visually looks okay. I tested both fuses and they're good. I tested the output to main/logic...