Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

[MadeJust]

Re: Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

Ok, let me try this again. I'm sticking the piece of wire into the cable side of the connector with it still plugged in. Better readings.. (Sorry this is new to me)

Pin 2 - 0.9v
Pin 4 - 12.8v
Pin 6 - can't get proper reading
Pin 8 - 0v
Pin 12 - 5.3v
Pin 14 - 3.3v

[MadeJust]

Re: Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

I *think* this tells me the PSU is ok.

[dick_barton]

Re: Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

It looks as though the power supply is working but knowing Pin 6 (Backlights ON) voltage at switch on out of standby would be helpful. Can you measure it on the bottom of the board.


If anyone else can offer some advice here I'm sure the OP would be grateful for your assistance.

[dick_barton]

Re: Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

Can you disconnect the main board from the power supply and connect the 5V (pin 12) using a 1K resistor to BLU_ON (Pin6) and see if the backlights come on.

[MadeJust]

Re: Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

Ok I'll try that. Any tips on how to go about it so I don't accidentally hit another pin? My hands aren't as steady as they used to be.

Meanwhile, if I have to order a replacement main board, which numbers have to match? I've found a couple with the same model number, but have slightly different numbers on the bottom of the label:

BN94-06711J, whereas mine is BN94-06880A. The other label number matches though with BN97-06298N

[dick_barton]

Re: Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

You can connect the resistors between the pins by soldering them to the underside of the board and make sure the legs are not touching anything else eg the chassis.

[MadeJust]

Re: Samsung 46EH5300 - Red LED blinks at single intervals, won't turn on

Hi, sorry for not following up sooner. I just installed a replacement board and it's the same thing, blinking red light, no power.