Samsung LA40C550J1R Flickering AND smearing

[Grunder]

If you've posted something under the wrong index, is it possible to change the index or do you have to retype the whole "effing" post? Im so pissed off now, i could shit a brick and pound this keyboard into a thousand pieces

[tw2005]

Re: Samsung LA40C550J1R Flickering AND smearing

If you've posted something under the wrong index, is it possible to change the index or do you have to retype the whole "effing" post? Im so pissed off now, i could shit a brick and pound this keyboard into a thousand pieces

interesting way to start the day. The mods here are pretty good and fix these small mistakes as you can see.

any way , you could help me out here as well because i have the same series.

From what I've read these have PSU issue for the backlight. I have not worked mine out fully but there are kits.

What I need help with is identifying the tiny SMD resistors located underside around these FETS.

Then i can keep going with this. On mine the FETs were blown and the 3.15A fuse blown.

After replacing the FETs and Fuse it worked but flickering and erractic backlight which was the original issue.(not my TV)

Then for a brief period it appeared good the bang. the 2 FETS blew again but this time on that area I highlighted blew up the resistors and a small transistor.

I can't identify the resistors due to the damage and there's no schematic for this version. There are 2 alternate PSUs which will work in this.

If you could take a closeup on these resistors or see if you can read the numbers on them. could be 3 or 4 digits.

[dick_barton]

Re: Samsung LA40C550J1R Flickering AND smearing

Your image is not sharp enough for me to make out the writing on the board but I think the power supply is a BN44-0034A. How close the BN44-00340B is to your power supply I'm not sure but it may be of help

[tw2005]

Re: Samsung LA40C550J1R Flickering AND smearing

It's the 340a. Same as
mine

[dick_barton]

Re: Samsung LA40C550J1R Flickering AND smearing

Is the 340B schematic of any help?

[tw2005]

Re: Samsung LA40C550J1R Flickering AND smearing

Is the 340B schematic of any help?

not really. Did not help me.