If i unplug or use pwr switch next to power cord,wait a few minutes,and reconnect,led is lit again-for 10 or 15 seconds again,remote and power button on tv front both will do nothing.
Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary. Fault to its main board. Short circuited component/s at it.
hi again,one more question on this topic:
parts are hard to find,i did find a used main board for this,but it comes out of a 337-b11,the part numbers are the same,seller states it works in both models,however,i have found the same board from a 342-b11 same as i have,if i get the one out of a 342-bll originally will i still have to do a firmware update?
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Hi Hindee11,
Here are some basic steps that will help you fixing the problem.
I'm assuming that your outlet is live.1.Power cord - check the cord it might be opened (no
continuity).This is due to frequent bending,pulling. 2. Power switch - check for dry joints, open contact. 3.Check the internal fuse-
sometimes the fuse fail because of the power
surge, replacing with new one will cure the problem, If this is the case I
would advice you to use surge protector/AVR (Automatic Voltage Regulator).
However if the fuse blew again this is an indication that you have a shorted parts in the power supply, you may visit the
link http://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info. If no reaction and
still the unit didn't power up then you have an open parts on the power supply.
4.If you see that the fuse is intact , don't attempt to touch anything
because there some fatal components
stored electricity enough to hurt you with a simple mistake only. I would
advice you to look for a professional
to troubleshoot the power supply. If you want to repair it yourself make sure
that you have necessary tools and test
instrument. First check bad solder joints(re-solder all cold
solder), leaky electrolytic capacitor(sometimes
it has bulged at the top but not
all, you better have a capacitor checker), open/shorted regulator transistor/IC(mounted
in heat sink), open fusible resistor
(caused by shorted regulator Transistor/IC), shorted zener diode.
Also check if your unit is under warranty before opening the back
panel, it will void the warranty. Avail it because the manufacturer of your
unit will fix it for free or a little charge only.
Hope I helped you.
Have a nice day!
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hi again,one more question on this topic:
parts are hard to find,i did find a used main board for this,but it comes out of a 337-b11,the part numbers are the same,seller states it works in both models,however,i have found the same board from a 342-b11 same as i have,if i get the one out of a 342-bll originally will i still have to do a firmware update?
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