LG L1953S doesn't power on

[dave481985]

Re: LG L1953S doesn't power on

thnx for your reply
i already bought these capacitors from a local shop for a lot less ans i am going to try to replace them
the top of c202 and c204 is a little bloated so i think i will start with them

[Joun]

Re: LG L1953S doesn't power on

Are they 105 Celcius rated?

[dave481985]

Re: LG L1953S doesn't power on

yup and they work great
i changed all 6 after all and it did the trick
thnx for ypur help

[priitvillems]

Re: LG L1953S doesn't power on

Hello,
In my case problem was caps and the short-circuited U303 (4511GD).

[Tomash]

Re: LG L1953S doesn't power on

I know it's an old thread, but I have several monitor with exact same problem.
To clear other funny readings in original post:
-12V output falls slowly - it's actually not powered (many caps on it)
-5V output falls faster
-U101 Pin 7 get's to 12V then crashes - probbably tries to start and bleeds out, this is repeater in about 1sec intervals
-U101 pin 1 should be line voltage, but falls a bit, due to resistor R108 and U101 initiative to charge C103 cap
-U101 ping 8 should get 5V reference voltage, but it also crashes, since U101 can't start in normal operation
Tempetarure has something to do with it. As I said, I have several monitor with exact same problem and when they are warm or have been recently in operation is fine. When I cool them or have been long unpluged, they won't start.
Help me please

[jiroy]

Re: LG L1953S doesn't power on

With those screens , you better change badcaps first , even if not bulged ...

https://www.badcaps.net/forum/showpo...3&postcount=21