Samsung blinking red light / wont turn on

[budm]

Re: Samsung blinking red light / wont turn on

See third page of the SCH. You have to make sure you disconnect the cables between the main board and the power supply when you are using force on resistors.

[echodreamz]

Re: Samsung blinking red light / wont turn on

Got it! Totally missed that! Any ol' 1K resistor will work? Yes, I would not force it on with the main board on, thanks for reminding though

[budm]

Re: Samsung blinking red light / wont turn on

Yes.

[echodreamz]

Re: Samsung blinking red light / wont turn on

Just to be clear...

In the CN801 connector, shorting pins 1 => 3. And on the CNI803 connector I am shorting pins 1 => CN801 pin 3 and possibly CNI803 pin 3 => CN801 pin 3?

[budm]

Re: Samsung blinking red light / wont turn on

Yes, you can try not connecting the DIM for now.

[echodreamz]

Re: Samsung blinking red light / wont turn on

Back lights fired right up. No power cycling, they've been running steady now for about 15 minutes.

[Shinju]

Re: Samsung blinking red light / wont turn on

That's good, I usually go about 35-45 min to get those CCFL's heated up as well as the transformer. Do you have a thermal meter?

[echodreamz]

Re: Samsung blinking red light / wont turn on

My meter does temp, but I do not have the probe for it. Ill leave it running then for a while and check on it.

[Shinju]

Re: Samsung blinking red light / wont turn on

Check for hot transformer, abnormal heat you can tell really fast, just put the back of your hand over top of the transformer (don't touch it).

Another way to tell, if you have an old CCFL that's still intact you can hover it over the inverter board, I think if it lights up dim over a transformer/ceramic caps you have a problem, Bright means its good. Might be the other way around lol since I got a IR thermal gun I just use that now.

[echodreamz]

Re: Samsung blinking red light / wont turn on

Nothing feels overly hot, I can feel some heat coming off them and the heatsinks with the high voltage warnings on them, but they do not seem overly hot.

EDIT: Looks like I will be getting an IR gun, they are pretty inexpensive on ebay, along with a better meter that comes with the thermal probes.

[Shinju]

Re: Samsung blinking red light / wont turn on

Nothing feels overly hot, I can feel some heat coming off them and the heatsinks with the high voltage warnings on them, but they do not seem overly hot.

EDIT: Looks like I will be getting an IR gun, they are pretty inexpensive on ebay, along with a better meter that comes with the thermal probes.

Sounds like your inverter and power supply are good!

[echodreamz]

Re: Samsung blinking red light / wont turn on

Excellent, so it looks like the main board is RIP.

[budm]

Re: Samsung blinking red light / wont turn on

+1

[echodreamz]

Re: Samsung blinking red light / wont turn on

Replacement board fixed the issue.

[budm]

Re: Samsung blinking red light / wont turn on

Thanks for the repair follow-up.

[dgoat]

Re: Samsung blinking red light / wont turn on

Can you confirm part # please?

[alcast]

Re: Samsung blinking red light / wont turn on

My Samsung Un46eh5300 just did the same thing except the sound also went out. Will a main board fix this? Thanks.