Forum > LCD TV forum

Logic 32LW782 intermitent fault

<< < (2/2)

westfield1:
Update, now its doing something totally different when i turn it on from standby the stby light goes out the screen lights up then goes out straight away and nothing, i have to unplug it and plug it in to get the stanby light and just keeps doing the same.

westfield1:
This one is driving me crazy   :41:

Ok its randemly going from....

Standby light picture for a split second then shut down.

Next time at power up from stby i get sound picture no backlight.

next time all works ok.

I have tried another psu, is there something obvious i'm missing, is this pionting to the main (17MB12.1) ?

Paul.

fix2003:
only tip i have

Vestal 17PW20 1 Power supplies intermittent not starting

Fault: Not starting, no backlight, switching to standby. Can be very
intermittent depending on temperature.
Cure: Replace R817, R818 and R819, all 620 K sm beside ic802 power factor
IC. One or all can drop in value.
The voltage across the mains smoother will be low about 330V instead of 380V
and the 24V supply will be low at 21v.

westfield1:
 :c017:
Thats been really helpful, think that i have not helped myself by trying 2 different 17PW20.1's as i now feel that they both are slightly faulty by that i mean one of them switches on from standby then shuts down straight away and when i fit the other one the tv will turn on fine from standby and work as normal 19 times out of 20 but occasionally turns on but no backlight.........Paul

Navigation

[0] Message Index

[*] Previous page