My friend experienced the "POP - and screen went blank" problem a
couple of months ago. He got an estimate on the repairs but decided to
get a new TV instead. I have worked on electronics in the past and
know a couple of people who have worked on similar TV's so figured I'd
take a shot and try to fix it.
Yesterday we replaced the YSUS and ZSUS boards with (supposedly) new,
working boards purchased from a local Zenith parts distributor. I
turned the unit on and had a full screen of black and white static,
then a few seconds later the left 2/3 of the screen displayed a
pink/orange static.The right side of the screen was mostly dark, with a
little dim static.
I unpluged the tv, waited 30 seconds or so and tried again, same
result. I hooked up a known working antenna, same result. So I
started fiddling with the remote. I think I was able to navigate the
memnu with the remote arrow keys, because each time I hit up or down
the colored static would chage a little bit (color or width). Blindly
changing channels also changed the colored static but it mostly stayed
on the left 2/3 of the screen. Also we did have audio, so I belive the
I also changed the inputs with the remote (just to see what would
happen, the only input attached to anything was the TV antenna) on some
of the inputs we saw a 3"-4" vertical orange bar that every few seconds
would change position, it kind of looked that a creen moving a display
around to prevent burn out. Note that this orange would appear on the
right 1/3 of the screen that had only dim static when I was navigating
the menu or changing channels.
When we were instaling the new boards, we found one connector that had
a pin bent down (possibly happened when being put back together at the
shop when the unit was taken in for the repair estimate?) so we looked
anround but did not find any other bad connections.
Anyway, sorry to ramble on but I am unsure of where to go from here.
If anyone has any ideas that would be great. Otherwise I'll probably
scrap the unit and try to Ebay the parts.
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Something short circuit with its circuit board. you must have through knowledge in electronics, and work experience to do repair work to this Plasma TV. As you know, plasma TVs are the latest technology devices, and a mere knowledge in electronics will not help. It will be best to get this set repaired by any experienced service technician or by the authorized service center for Zenith at your town. [Short circuit protection circuit energized, and latched the relay, not to supply voltage to damaged circuit board is the problem] The click sound you heard was the latch sound of the protection relay.
On the power supply circuit board some capacitors will vent (top will pop open), dome, or bulge. They can be replaced but the board is two sided and easy to damage. Having the caps replaced at a repair shop is the best way to go. If diyers try it the board can be damaged and then it would have to be replaced. Repair may cost a couple hundred dollars, but a new board can cost that alone, not including installation.
most units are made by someone else. your unit probably has LG parts. get the unit looked at by a Toshiba authorized servicer. they may be able to repair it at component level. the $900 you stated sounds at least $200 too high for board level repair.
I have been through the LG TV runaround, and I can tell you that it isn't easy. On the same unit that you are currently working on, the part numbers of the parts you received may or may not be correct. LG (Zenith) uses slightly different parts for the same model, and it really is kind of a gamble on which ones are right. They do not keep track of parts by serial number, and on different TV's of the same model, I have been through 8 control boards (on one set!), 4 sets of X and Y sus boards (on one set), digital boards, and so on and so on. The people are nice in LG's tech services, and they will admit to the fact that it may take several of the same parts to get it right.
My shop has decided not to work on LG or Zenith for this and other reasons. The turnaround time to get a TV back out of the door is ridiculously long because of the wait time with parts going back and forth.
In short, you have the right boards, but they may be the wrong boards. Maddening, isn't it?
i just had the same problem. after talking to many tv repair people i finally got a knowledgeable person to help me. i ordered the part and fixed it myself.
it was very easy. i have an LG model# 50px1d. so if you had this problem i suggest you order the part yourself and fix it. i got an estimate for repair and it wouldv'e cost me at least $500 parts and labor. i paid $230 for the part. so you can see i saved a little more than half. the part you need is the " Z SUS " ASSEMBLY. you can order the part from LG website. the part # is 6871QZH044C.
let's just say after doing everything myself, i am watching TV right now.
by the way LG would not help me at all. spread the word that LG is not a good product.
I purchased this tv 2/06 and it went POP in 04/07. Less than 60 days after my warranty expired. Went back and forth with Zenith for several months. I refused to take NO for an answer. Customer service stinks and you have to be very persistent. They eventually agreed to fix it. Repairs cost over $2000 and I have my tv back. Next time it breaks just going to throw it out. Zenith sucks.
Hi Gemma - have a look at this forum - it may be similar to what you are experiencing.
Things don't look good for NEC owners I must say!