LG 1942TQ -stinks

[smason]

Here's a weird one.
LG 1942TQ from work. Was functioning fine, user complained that it smelled bad.
Help desk guy agreed, and replaced it. 'course I snagged it

Took it apart expecting an arcing lamp, melting connector, oozing cap or something obvious.
Nothing really. Power supply pcb has some heat marks, nothing fails the sniff test (powered off) and the Samyoung and Samwha caps all have flat tops.

Wait a sec. What's that?
The big mains cap is bulged! Never seen that before.
Measured (in circuit) the ESR micro says "what cap? I don't see a cap"
My Fluke 87 says, .4uf or so. Will pull it and measure it later.

[smason]

Re: LG 1942TQ -stinks

The big mains cap is bulged! Never seen that before.
Measured (in circuit) the ESR micro says "what cap? I don't see a cap"
My Fluke 87 says, .4uf or so. Will pull it and measure it later.

Pulled it and it's definitely toast. I just did a cap order, so will wait until I have more stuff to order, or perhaps I'll steal one from one of my spare boards.
'course on all of my spare boards you can't read the cap values on the large cap, and they're glued down.

[sabre504]

Re: LG 1942TQ -stinks

Have had a spate of these lately ,
some swollen and some with corroded legs and a few suffering from both .
Mainly in 22" Technika's and Cello's.

But as a rule you don't see it often

[smason]

Re: LG 1942TQ -stinks

some with corroded legs

Yeah. one of the legs fell off when I was removing it.

[trodas]

Re: LG 1942TQ -stinks

Samwha caps - known crap. Be lucky it did not catch fire yet. Replacement is easy to get on Digi-key, tough