Question about Zenith E44W46LCD 44" Rear Projection HDTV-Ready Television

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No Picture, full sound, green power light is on, backlight OK

Hi!  I looked for this same problem on the sight, but couldn't find it (so sorry if it exists already!).  
My Zenith (Model E44W46LCD) rear projection TV is about 4-5 years old (I inherited it, since my folks died); I've used it for three months so far; it was in climate-controlled storage for almost two years.  (Not sure if this is relevant info. -- but my folks used it for about two years and were pretty heavy smokers; I do not smoke).  
I got it out of storage and started using it in mid-October.  It worked fine, except for when it powered up, one of its fans was pretty noisy.  Eventually, that extra fan noise went away.  Then, about three weeks ago, I started to not get a picture when I turn it on:  It powers up, the green light is on, the backlight is on, both fans are operating, I have sound - but no picture whatsoever.  I've vacuumed the filter on the back of the set, as it was dusty.  Sometimes after I've powered it on or off a few times, the picture will return (today so far, to no avail -- it's been gradually getting worse).  I called a local TV repair and was told it SOUNDS like the video board may be shot, but they don't do many of these types of repairs, as most people tend to repair their own rear projection TVs (they will still come out and fix it; but given my finances, I'm trying hard to see if I can save money on attacking this on my own).  I'm interested in learning, but know very little about them.  I'd like to give it a shot; I'm disabled, but have a neighbor who repairs MRI machines (he admits to knowing nothing of these rear projection TVs as well) and he'll help -- if I figure out what's wrong, get the schematics and the right parts.
So, in summary -- I'm wondering if anything else should be checked, or what else could be wrong before ordering a video board . . . then wondering if you know of a free download of a service manual (found a place for $8 so far) . . . . and where to order parts, if necessary.  I tried to price out a video board on Tiger Direct, but did find them there for Zenith.  And, if you think I should just throw in the towel, based on what I've told you and hire someone, let me know that, too!  Maybe things are "too sensitive" and this neighbor and I could easily botch something??  Or is the TV repair place right, that they are rather simple/basic systems?
Any help you can give me will be greatly appreciated -- in advance, thank you VERY much!!  It's awesome you guys provide this type of service for us "clueless ones!"
Christina

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The video board, or small signal module, (depends on what the manufactures calls in in their sets, but are the same thing), sounds likely the problem. These boards are a little expensive, but still much cheaper than what the set costs....

Try ALL of your video inputs. Some still maybe working inspite of others. This may allow you to hook up an external tuner such as a VCR with cable or a Sat receiver to those input jacks if they are working.

If not, do order a small signal board and a service manual that shows parts breakdown. This maybe a good refrence as to where the board is located and seeing what parts are involved in dismantalling and putting it back together.

If you do attempt this yourself, here are some key notes:

#1. These sets are extememy STATIC SENSITIVE! That means if your body contains static electricity, the static electricity can do more harm to the circuits inside. The first thing you should do is make sure you ground your self to something metal, such as your computer cabinet, a cold water pipe, or the metal housing from your breaker box. This is IMPERITIVE as to keep your body discharged at all times when handling sensitive components. You do this by taking a long peice of wire, strip both ends about 6 - 8 inches of bare wire showing, wrap one end to something metal and the other end to your wrist or ankle. You are now safe to work on your set without damaging anything via static electricity. (An average person stores over 1 million volts of static electricity, yet not enough current to seriously hurt an individual when touching something metal to discharge it, but sometimes can feel a "snap shock". This is completely harmless, but a MUST DO factor before touching any boards inside your set.

#2. Make sure you have all proper tools on hand: 1 phillips screwdiver with a #2 head, a standard screwdiver, wire cutters for cutting plastic zipties to loosen wire harnesses, (some sets don't have these, but most do), and replacement zipties, and if your planning on testing run your set without the back cover in place, then your gonna need a pair of UV glasses. (Normal sun glasses will NOT have the proper UV blocking level to protect your eyes from the lamp). You need to get a pair of safety glasses made for blocking exteme amounts of UV radiations. Otherwise you will have to insall the back cover everytime you want to test run your TV or risk perminant eye damage. (Hurts like hell looking at the exposed bright light without the UV glasses and WILL indeed degrade your eyesite, even if just looking at the light for less than a second). If you have the UV protective safety glasses, then you can leave back of and defeat the safety switch located near the filter to allow set to run without the back cover or filter plate.

#3. Having colored markers to mark plugs and wires inside your set as you take it apart wich allows you to easily identify connectors when you put it back together.

#4. Depending on how extensive you will be taring down your set, make sure you have plenty of room to place parts in orginized fashion. Go in reverse order from where your parts are laying in getting your set back together. Make sure you DO NOT lay boards on carpet, or any other materials of which can store static electriciy. Wood or metal tables will do just fine.

#5. Get your part on order along with a service manual before taring down your set. It can be days, weeks or months before receiving part(s) needed. After getting the parts, then it will make reassembly much easier after disassembling while it's fresh in your mind. Leaving something apart for to long tends to confusions on reassembling, especially for individuals who has never done this kind of work before.

Now, with these inportant factors set in place, it is up to you in deciding if you want to go through the steps, or maybe in your favor to find a compitent tech to do the work for you.

A good place to find parts:
http://www.encompassparts.com/

Make sure you click into the GUEST LOGIN link located on the right hand side of page before it will allow you to do a model search for parts. If you are not comming up with anything your looking for, click on the CONTACT INFO link and start making phone calls. These guys are usually great in finding what you need to get your set up and running.

Good Luck!

Posted on Jan 18, 2009

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