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Dmtech dml-4126
sabre504:
HI all have a strange problem with this 26" lcd ,
when first start up all works fine all inputs work, menu's work and remote all fine until you turn it off then it stays in standby.
Tried a new PSU but still the same leave it unplugged for a couple of hours and it will work again but only till you turn it off.
Before i start delving into tests just wondered if anyone had come across this with one of these before or have any suggestions .
:c017:
fix2003:
tip
Check / Replace Regulator Q584 NCP1117DT18RK, CHS Part No.: NCP1117.
(RS Stock No. 518-8284 25 p each must buy 5)
also Under the metal screening can on the video PCB. I replaced C1, this capacitor
was very hot (adjacent to Q584)
all the best
vince waterbeach
sabre504:
Hi Vince thanks for that wiil check those ,
was pondering the 4 pin regulator as well as it has the shut off pin but will try your suggestion first
:c017:
sabre504:
Hi Vince well i tested Q584 and the voltage reading was up and down as the tv is trying to start .
Q584 on mine is different from the one you qouted and not near C1 ,so i started volt testing all the regulators but when i tested Q583 the tv started up ??
Thinking i may have shorted something i turned it off and then on again but the tv just cycled trying to start
pushed down on Q583 and again it started .
So either it has a bad solder joint or one of the tabs has a bad connection inside the plastic case so going to change that one first and see what happens :dubbio:
fix2003:
ACE
glad you got it sorted
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