40" RCA L40FHD41 |Powers on, soundOK, no Backlight or "Deja-Vu 2"

[Shock2cure]

Guy brought this RCA over last night, say's it's his Dad's. Powers up and audio's there, but no picture, (no backlight, no vid-display). it's got 2 boards & a T-con.
HV Inverter transformers on one side.

What is it with these mystical 1/2 black 14 pin Molex connectors I keep finding? ..lolz! Unreal, this is #3 in what? ...week?, 10-12 days? Since that 60" Westinghouse.
I may have figured this one out already , 2-3, pregnant shorted 16v 1000uf lytic filter caps slowing down the show at final outputs, and a starving ground syndrome at HV inverter (once again third times a charm)

(look at those factory, big-$$$, mount ground screws for the inverter, Now how much would ya pay???...
(I'm going to replace 'em with real ones

after closer inspection, looks like be Replacing caps CS3, CS5, CS6, CS7 on PS board 40-6PL37C-PWD1XG, chance that they took out regulator(s) maybe, will check, defective caps kept my 24v & 12v off
inverter transformers seem to ring ok, going to have to dig in some bins for yet another 14-pin molex, or reasonable facsimile....
Be back with the verdict later...
~PeasOut

[Shock2cure]

Re: 40" RCA L40FHD41 |Powers on, soundOK, no Backlight or "Deja-Vu 2"

Got away with the cheap fix this morning, just had to "make" another 14 hole/13-pins supply cable for the inverter, even luckier was that 5 of the end 6 burnt-up wires were all 24 volt feeds, (the 6th one was a ground) so pin to hole placement on PS board side was irrelevant. 5v, 12v, & 24v regulators were still A-ok, replaced the 4 1000uf electrolyts, even though two of them showed no signs of wear, figured 2 obviously bad "EPCOS" brand caps would turn into 2 more bad "EPCOS" brand caps later on

Now to deal w/ this 47" Philips... "ugggg"

[Andrew F. Ali]

Re: 40" RCA L40FHD41 |Powers on, soundOK, no Backlight or "Deja-Vu 2"

Good work.

[Th3_uN1Qu3]

Re: 40" RCA L40FHD41 |Powers on, soundOK, no Backlight or "Deja-Vu 2"

EPCOS are normally very good caps, that is either a really crap design (maybe using GP caps instead of Low ESR type?) or those caps are counterfeit. It is not unheard of for a factory to get burned with fake caps, stranger things have happened.

[budm]

Re: 40" RCA L40FHD41 |Powers on, soundOK, no Backlight or "Deja-Vu 2"

I do not see EPCOS logo on the caps at all.
B41044 series: https://cdn.badcaps-static.com/pdfs/...0e38fd9d36.pdf

[Shock2cure]

Re: 40" RCA L40FHD41 |Powers on, soundOK, no Backlight or "Deja-Vu 2"

dunno any other way to spell them, but says EPCOS on them

[budm]

Re: 40" RCA L40FHD41 |Powers on, soundOK, no Backlight or "Deja-Vu 2"

It does not matter at this point, just replace them with good brand 7 correct type.