Question about Toshiba CN36H97 TV
I have Toshiba cn36h97 that will come on with no picture, only a purple line in middle that will go up and then the screen goes blank. When it is powered off it will expand up from the middle to white rectangle and then off. Earlier it would sometimes work OK, but seems to take longer to come on than normal.
Thank you very much for your help.
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Posted on Jan 02, 2017
SOURCE: toshiba 36zp38b picture problems
With it only being about 3 years old, I would suspect bad solder connections rather than defective components like Capacitors. You may get the symptoms to come and go by slapping the side of the set or jaring it slightly which would prove the bad connection thesis. It is not a permanent cure however and you can make it worse if you keep doing that. A solder repair shouldn't run over $225 in my opinion.
Posted on Mar 12, 2007
This is actuall quite a simple problem... What you have explained here is a loss of vertical deflection. By the symptoms you described, working now and not working it's most likely the the vertical IC an LA7847-E has probably become ring-cracked at the point where the pins are soldered to the pc board. Depending on how long it has been allowed to arc the IC may have failed also, but they are not terribly expensive or difficult to repair - at least not here in the shop. The main board has to be removed. Locate the vertical IC - it will be mounted to a metal heat sink and the IC will be stamped LA7847. Then turn the board over and inspect where the pins are soldered to the foil side of the board. One or more will look ring cracked or fractured all the way around the pin. At this point you have two options, carefully reflow solder over each pin and put it back together or replace the IC by de-soldering it and removing it from it's heatsink. remember to use a good heat sink grease when applying the new IC.. There should also be a couple of caps in pretty close proximity to that IC... One should be about 50v/100uf and in the shop here we test em all... You might also just replace that one for good measure - they're not expensive either... If any of this sounds too complicated take it to a reputable shop and pick it up in a day or two.. Job shouldn't be that expensive or time consuming. My record in the shop here for doing those is 15 in one day. Average cost for that set, we charge is under $100 if you bring it in and pick it up.. Hope this helps Bill If you're calling around to the repair shops you might just ask if they have that IC on-hand or if they will need to order it..
Posted on Jun 07, 2007
Most problems indicated by your description involved the Vertical IC. With your post "tap...pop back up" signifies a loose connection or to be more specific a cold solder. I suspect that no part(s) need top be replaced but would however require re-application of heat with the use of a soldering iron.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
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Posted on Feb 19, 2008
there is a problem with vertical baleiage on your screen and need one ic changed but you cant do that yourself need to go in authorized service
Posted on Dec 10, 2008
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