Mulja tv repair portal

Equipment Repairs => LCD TV forum => Topic started by: tv john on May 13, 2010,16:13:03

Title: LE37A456 C2DXXU
Post by: tv john on May 13, 2010,16:13:03

This samsung lcd starts as usual, after a short period starts hissing and crackling through speakers.
When the noises get louder the video blanks and set goes to standby. When it cools down the process star ts again. Thought about audio amp,but customer won't let it out of his house.

Any ideas John.

Title: Re: LE37A456 C2DXXU
Post by: chrissie jones on May 13, 2010,17:23:09

theres somthing over heating.you wont know till you get it on the bench and preform hair dryer and freezer on it.

Title: Re: LE37A456 C2DXXU
Post by: docdave on May 13, 2010,21:48:34

Quote from: chrissie jones on May 13, 2010,17:23:09

theres somthing over heating.you wont know till you get it on the bench and preform hair dryer and freezer on it.

Title: Re: LE37A456 C2DXXU
Post by: docdave on May 13, 2010,21:55:47

 wow john such a small tv. inform customer that if they live with it. it will only get worse. and then not com on. on this model broblem is (probally bad caps in power supply) did you get a look at it inside. DOC

Title: Re: LE37A456 C2DXXU
Post by: daz on May 14, 2010,04:30:48

hi john
ive had very similar problems several times on the earlier le40r88 ish models, cpu gets mad hot,it
was a new pcb in all cases,
try flattvparts for a used one
daz

Title: Re: LE37A456 C2DXXU
Post by: sparky on May 14, 2010,05:22:59

hi
how can you say 37" is a small tv try to isolate the fault
and fit a small fan to keep it cool,cheaper than a new panel
sparky

Title: Re: LE37A456 C2DXXU
Post by: tv john on May 14, 2010,05:33:18

Forgot to mention,it takes less tha a min. to go faulty and caps look ok.
Flattvspares only have a new one going by the price as chs are cheaper.
Don't want buy a new one just in case it's the main pcb,like audio amp overheating.
Thanks John