SOURCE: No picture on a Westinghouse lcd tv model ltv-20v4
The simplest problem would be the failure of the backlight.
In case you don't already know it, there is one, and they may or may not last forever.
Also, there is an extra power supply to produce the high voltage the lamp needs to fire that may have failed.
Sometimes, you can look at the screen from an angle to see if there is any sign of movement.
If you can see program material causing a change in the faint image, then you can be pretty sure it is one of the two problems mentioned.
SOURCE: Westinghouse LTV-20V4 turning on PROBLEM
This problem is with fair certainty the
power supply.
Modern power supplies are designed to shut down if
the current drawn exceeds the design level which indicates that something the
supply services or the supply itself has died.
If you are adventurous, you might pull the plug on the set, allow
the set to sit overnight, gain access to the innards, and with good light,
inspect any boards inside. If you see one that has few ICs but many more larger
discrete parts, this will be the power supply.
You are looking for components called electrolytic
capacitors that are almost always cylindrical and mostly installed upright at
90 degrees to the board with leads passing through to the solder side.
This same type of component in smaller dimensions
is still used in a horizontal package with leads bent down and passing though
holes to the solder side.
The latter are becoming more rare since they don't
lend themselves well to robot assembly.
Many (not all) will show signs of pregnancy when
they fail, bulging unnaturally when compared with others. Now and then, there
may be traces of a crystalline deposit around the end where the seal failed
from internal pressure.
These will have values listed on them in uFd & VDC
and sometimes, a plus/minus number lying about the precision.
Some also have a date code (rarer) that will look
like four digits:
2403 = 24th week of 2003
Most electronics suppliers have a stock of
the various values but if they have a date code at all, try to get only those
made before 2002 or after 2006.
The larger caps will probably be OK since the failure is likely
related to functions other than brute-force filtering. A pretty good 'rule of
thumb' is to replace any caps you see bulging that are 100 uFd or less.
If you choose to replace these yourself, you will need a quality
soldering iron with a small, preferably iron-plated tip, rosin core solder and
a sponge which when wetted is used to frequently wipe oxidized solder from the
tip this should be kept bright and clean and fresh tinning will keep it that
way.
You should also buy some solder 'wick' with the iron; this is used
to place on the solder you wish to remove and then heated with the iron.
Properly used. the wick will absorb nearly all of the solder from the lands
from which you wish to remove a component.
SOURCE: picture blurry on my Westing house LTV-32w3 HD Television
hi possably is the fan in the back make shour it is working all the time that there is no dust bild up on it stops it from spining it may need a cleen ,or it is a transister heeting up and cooling down the transister is on its way out it will be a hard fix for a tech to fined thay will fined it but it will cost you a heep ,its best to whate till its gon completly .cheers peter
SOURCE: I need a service manual for a Westinghouse LTV
There is no Service Manuals available for Westinghouse. This is off brand made in China. If you have an electronics trouble shooting back ground then it will not be a problem as you know. If you describe your symptoms and what you have checked I will be glad to assist you.
Testimonial: "That is good to know. Thanks explains why I have no luck finding one. "
SOURCE: I need a remote code for a westinghouse LCD TV,
Hello, if the remote is a universal remote you will most likely need to input the Sony codes. Another option is to purchase an original remote at [email protected], the price for the remote is $15 plus $5 shipping and handling.
59 views
Usually answered in minutes!
×