No Power On Lexsor 32in (LC-32w18sd)

[ashok]

Hi all,

I have a lexsor 32 lcd. It does not power up. I checked the input AC (240v) and also checked caps etc and they all seem fine. Measured the output on the PSU and it is all zero. Checked the buck converter IC's on the second board and they not giving any output either. Any ideas/suggestions please?

Thanks

[munirutech]

Re: No Power On Lexsor 32in (LC-32w18sd)

hi

when you power the tv is the stand by light on?if no then the 5v section of the psu is faulty

[ashok]

Re: No Power On Lexsor 32in (LC-32w18sd)

no stand by light. Is that the 5v buck converter chip (on another board)? i measured the volts on that chip and there is nothing there but i thought that may be because there is no power going in from main PSU board.

[Silver Dove]

Re: No Power On Lexsor 32in (LC-32w18sd)

Dear Ashok
1. First Check the mains voltage is reaching the Power Supply Pins - Be careful while checking
2. Check whether the SMPS transistor is working

your SMPS seems to be dead or 5v standby section is dead

[notallbad]

Re: No Power On Lexsor 32in (LC-32w18sd)

Worth pointing out that the rocker switch (on/off switch) should also be checked, thats if it has one, I had a Lexsor sometime ago that had a faulty rocker switch(on/off switch).

[ashok]

Re: No Power On Lexsor 32in (LC-32w18sd)

Thank you both
I've checked the mains voltage on board and it seems fine and this also proves that rocker switch is functioning properly. I am thinking of removing the buck converter chip (5v 3A) and put external supply and see if it works, if it does then i will buy the chips and replace them both.

[ashok]

Re: No Power On Lexsor 32in (LC-32w18sd)

I've found a similar PSU board on line but it is slightly different from mine. Mine is KAS200-5S241812X VER A2.1 whereas the one I've found is KAS200-5S242212X VER A2.31. I was wondering would this new PSU work and is it worth buying?