I have a LG l204WTX which doesnt turn on, and has been sitting around for 3 years or so now. Back in the day it would sometimes turn on and function normally just by unplugging/plugging in the power cable. it would continue to work as long as it didnt turn off or go into sleep mode.
Anyways, its completely dead now (and has been for 3 years), with only a rapid flashing blue/yellow light. I probed around and the 5V rail going to the controller board read at 5vs. The 15v rail however was at 18V. Could be a problem, could just be because the LCD (backlight and data) and VGA/DVI was disconnected and that was the unloaded voltage.
What I did notice were some bulging caps. The caps are SAMXON GF(M)'s.
The two that are bulging (and are on the 5v rail) are 16v 1000uf (V8A markings, red arrow),
the two short ones (on the 15v rail) 680uF 25v (V8A markings, blue arrow),
and the tall one between the two bulging is 25v 1000uf (V9A markings, yellow arrow) (also connected to the 15v rail)
I think this is the correct datasheet (found from another post on here)
I dont see anything about the ESR of the caps, but the ripple is 1.2A and the inductance is 60mOhm.
Searching digikey I found these and I'm hoping that someone can give me a second opinion on these caps. I think they should work. The height restriction is 23mm at most, the current caps are ~16mm.
Nichicon HW, data sheet here
680uf, 25v, 30mOhm, Ripple current 2A
1000uf, 16V, 30mOhm, Ripple current 2A
1000uF, 25v, 19mOhm, Ripple current 2.5A
I'm concerned about the ESR rating of these caps, or rather, the lack of the rating.
Why does both the Nichicon and the SAMXON have no ESR rating?
thanks for the help!
Anyways, its completely dead now (and has been for 3 years), with only a rapid flashing blue/yellow light. I probed around and the 5V rail going to the controller board read at 5vs. The 15v rail however was at 18V. Could be a problem, could just be because the LCD (backlight and data) and VGA/DVI was disconnected and that was the unloaded voltage.
What I did notice were some bulging caps. The caps are SAMXON GF(M)'s.
The two that are bulging (and are on the 5v rail) are 16v 1000uf (V8A markings, red arrow),
the two short ones (on the 15v rail) 680uF 25v (V8A markings, blue arrow),
and the tall one between the two bulging is 25v 1000uf (V9A markings, yellow arrow) (also connected to the 15v rail)
I think this is the correct datasheet (found from another post on here)
I dont see anything about the ESR of the caps, but the ripple is 1.2A and the inductance is 60mOhm.
Searching digikey I found these and I'm hoping that someone can give me a second opinion on these caps. I think they should work. The height restriction is 23mm at most, the current caps are ~16mm.
Nichicon HW, data sheet here
680uf, 25v, 30mOhm, Ripple current 2A
1000uf, 16V, 30mOhm, Ripple current 2A
1000uF, 25v, 19mOhm, Ripple current 2.5A
I'm concerned about the ESR rating of these caps, or rather, the lack of the rating.
Why does both the Nichicon and the SAMXON have no ESR rating?
thanks for the help!
Comment