lg-37lg31rc

[WILLYAM1]

HI to all.
tv works fine but when turn it off by remot or stby botton  and turn it on again power led is blue(ok) but no screen no backlight no sound.
no 24v no 12v no 16.5 only 5.2v notice that all volltage  inv on low (suld be 3.3 and alsopwm signal low0 when plug out the inverter main cabel voltage came back again(inv on  'pwm sig' bright....)but still no 24v no 12 no16.5 eroor signal rize to 3v shuld be ov.0.
anyone hade the same problem?.
wikllyam,1

[WILLYAM1]

were is all the expert? daz? sparky? turnip?brainstorm? vladimir?and ...........willyam1.
when inverter is out p.s works i have all voltage have sound but when inverteris fitted back sometime  backlight wirks sometime it dosent and no output voltage from p.s no12 v no 24v no 16.5v .
not sure if problem in p.s or in inverter or main board.
help willyam1.

[daz]

hi willyam
i for one is very hungover,    took 10 minutes for me to remember how to use a screw driver this morning,got lots of posts to catch up on but i will try to help, havent met this model before, post some pics of the three pcbs, it might jog my memory.
regards
daz

[WILLYAM1]

thanks daz.
i will some photos tomorow.
wikllyam1

[WILLYAM1]

here some photos
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[daz]

hi willyam
haven’t seen this one yet so not going to be much help, but check the inverter does it use a bd9897fs if so I would change this first as they can give problems, also had problems with poorly fitted lg backlights intermittently arcing to the shielding at startup causing the set to go into fault mode, you will have to strip the panel down and check for burn marks near the ends of the tubes.(also check for loose tubes)
hope this is of some help
daz

[WILLYAM1]

thanks daz i will check and keep you posted.
willyam1