Question about Toshiba 65H84 65" Rear Projection HDTV

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TV turns off and on when hot

My 65H84 tv powers off and on repeatedly when the room temperatures heat up. When we point a small fan towards the back of the tv it will usually remain on (if the room is not TOO hot... we've discovered that at 84 degrees it won't stop cycling off and on).

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Check both the fan and the air entry area and make sure that both are free from dust and debris. The fan may be tuning too slowly to properly move air around. A quick vacuum of the area should help.

If that fils to correct the problem, please update this and we'll start looking at potential parts failures.


Posted on Jul 11, 2010


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Posted on Jan 02, 2017


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My philips lcd have statrting problem in winter tv turn on some after statrting room heater

Some flat screen TV's generate a lot of heat at the back. You can do some test by placing the palm of your hand above the TV or even a thermometer on top the TV without touching the TV body and see how the TV temperature fluctuates during the 12 months of ambient temperature. In Summer, it my run hotter and in Winter it may still run hotter because of these reasons... the TV is close to the heater, it is inside a wall unit or it is in a corner where no air circulation is present. In the wall unit, no air circulation is present and the heat you feel above the TV is actually whatever bit of cool air it can draw from the rear part of the TV openings to cool the components. I know that most TVs are always close to a heater, fireplace, or a radiator that generates heat towards the TV. Again, if you put a thermometer on the TV and observe the different temperature range, you will notice a raise in temperature on the thermometer when you have the TV placed by a wall whose outer wall is facing the hot Summer sun, or when you have any means of heating system to keep your house warm in winter (while you live inside wearing a T-shirt and shorts), a warm fireplace (gas or wood) next to the TV, and or an electric radiator, or an integrated home heating system. These affect the appliances that rely on cool air circulation. And TV's are the first to suffer from excess heat and they seize unexpectedly. So, the first thing is to keep the home temperature under 25C by reducing the heating system and wearing proper winter clothes instead of T-shirts, etc. If the TV is next to a fireplace, that room is really warm and is suicidal for the TV. Move it where it is cooler and not in direct heat from the fire. Stand by the TV and see if you can feel the fire heat radiating in your face. If it does then that is no place for your TV. Move it away and rearrange the seatings so that you can watch the TV and still have the heat radiating to you, and not the TV. of all the modern technology we have today, the TV still doesn't come with a cooling fan like a computer and yet they generate more heat than a computer. If you have some wiring experience, go to an electronic store and buy yourself a large (4 inch) silent cooling fan, either mains operated or 12v. Mains is usually plugged directly in the mains socket, but 12v fans need a 12v, 1 amp transformer.
With some plastic covered wire ties, insert them in and out of the cooling grille at the back of the TV, usually the lower ones because that's where the cool air enters and exists at the top as hot air. Then attach the fan against the grille with one end of the tie inserted in the corner holes of the fan body and with both tie twist them tight and firm. You must make sure that the fan is placed where there is a large slotted area to freely allow as much air as possible, otherwise it either makes air noise or it will not cool effectively. Most TV rear cover has a generous amount of apertures in the form of vertical slots or hundreds of holes for cool air to enter, but a fan will force more cooler air, therefore the TV will run cooler. Then you connect the fan wires to the transformer. It's a pretty straight forward wiring if you're know a thing or two about wiring, plus - less (+) (-) voltages and cable colors. if not have it already wired and working by an expert to save you the stress of this wiring. But I believe the placing of the fan on the rear of the TV should be a piece of cake for you if you followed the simple advice above on attacking and tying fan on the lower rear part of the TV. Alternatively, if you've got money, let an qualified expert do the work foe you for a small fee. You just buy the fan and the transformer to suit. Don't forget to ask questions when you buy them, does the voltage on the transformer match that of the fan? Remember the fan will run all the times so, when you switch the TV on you want the fan on too. So, to make it easier for you, buy one of those remote controlled power boards on the market today. Plug a divider on one of the socket on the board and connect the TV cable plug in one side and the transformer on the other side. Since it is the TV that you watch most often, use socket one (number 1 on the remote). When pressing number one on the remote you have power for the TV and the fan. When you finish watching TV, press the same number one button to turn its power off or press the main button on the remote that removes all power to all devices, therefore it will save you electricity by disconnecting any power to any appliance connected to power board's sockets. Hope this explanation helps you one way, or another. Cheers.

Dec 28, 2014 | Philips 32PFL3403D/27 32 in. LCD TV


How to cool big home with small air conditioner(s)

A lot of people have only one or two rooms that can take an air conditioner in the window. Often times, the air conditioner is also rated at a cooling power that would make you believe that there is no way that it can to cool the whole house/apartment. You can crank it to the max to try to cool as much as possible, but then this makes one room too cold and the others still stay too hot. You can try blasting the cool air down a hallway with a fan on maximum speed, but that only works so well. And, it's noisy, too. Well, I have two 260 sqr ft rated room air conditioners and I am cooling 2000 sqr feet of house to a comfortable 72 degrees in all rooms and it's been 95 outside all day. How to do it?

The trick is setting up your home to take advantage of laminar air flow. Set your air conditioner to say 68 degrees and start it in the middle of the morning before it feels hot outside. Put the AC deflectors pointing downward and towards the door. Put fans in the doorways pointing out of the rooms that have the AC. Point them level to the floor (not up) and put a fan to one side near the end of long hallways. Set the fans on the lowest power setting (not high). If the hallway branches out into a bigger room, put a fan in the room that is blowing across at a right angle to the entry, pointing the air flow parallel to the wall. This will circulate the cool air around the room. Keep the fans on low and pointed parallel to the floor, not up!

What you have created is a re-circulating air flow system, much like the North Atlantic Current that moderates the temperatures of Europe. You can check this by taking a tissue paper and holding it up to the top of the doorway. The air flow should be pushing the tissue away from the room without the AC and toward the room with the AC. This happens because the warmest air will be toward the ceiling and you want that warm air to make its way across the ceilings and back to the room with the AC, so that it can be cooled again. The cooled air from the AC will sink to the floor and the fans will gently push the air out of the room with the AC. It will stay low and travel along the floor in the opposite direction and into the warmer rooms. If you crank your fans up, you will create turbulent flow and that will not cool your house as efficiently as will laminar flow. Monitor the outside temperature and when it gets cooler outside by a few degrees, turn the AC to fan for about 10 minutes to eek out the last of the cooling. Then open the windows for the night to take advantage of the free cooling that nature provides. That's it! Enjoy the summer!

on May 25, 2015 | Heating & Cooling

1 Answer

My led tv just shuts off.wait 10 mins and it can

Seems that your TV is subjected to overheating. Flat screen TV's need ventilation or they will suffer terribly. If the TV is inside a cabinet, air does not circulate well and in summer is may over heat. In winter the room temperature also plays its part in overheating the TV. When the problem happens, observe why, feel the temperature in the room and not the days it happens. If it shuts down and then 10 minutes later if restarts, this is temperature related problem. Try and place your TV on an small low cabinet so that the rear of the TV has enough air circulation without the hot air that the TV produces returned into the TV back panel. normal air is usually sucked from below the TV and expelled above it. Place your hands on the top back part of the TV and feel the heat. place your hand below the back part of your TV and feel how cool it feels. When a Flat screen TV is placed inside a cabinet designed for TVs, the air circulation is affected, and it recycles hot air back through the lower part of the TV therefore heating it to a critical level that it eventually shut down to prevent damage to components. And in winter, when your heaters are on, the room heat can actually damage the TV in those cabinets. Try and place the TV in the open part of the room and see if there are changes with the problem. if it stops, then that was the problem.

Oct 17, 2014 | Televison & Video

1 Answer

I have a Panasonic pt-56dlx75 television that has

follow this recomendation.God bless you
Temperature is a common reason why many Rear-projection TVs do not perform well when they get to hot. You may start to see your TV shutting down automatically when it overheats. Here are a couple of things you can do to prevent overheating. First make certain any TV ventilation ports are free and clear of debris and dust. Second make sure the TV has enough room for airflow. Third, the temperature in the room should be around 72 degrees. Due to the high degree of heat generated by a rear-projection TVs, it is not advisable to watch TV on a hot days when you don't run the air condition. This could cause damage to your TV.
  • Check the fan. Once the television is turned off, it is just normal for its fan to become louder. A projection TV actually depends on its lamp, which requires cooling so that it will not prematurely burn out. If the room where your TV is placed is very hot, the fan would also continue to run.
Replace projection lamp. To properly do this, make sure that the lamp's bulb has cooled down and the TV is unplugged. Carefully remove the cover of the lamp's compartment using your screwdriver (Phillips-head). Unscrew the sealed part of the lamp that can be found at the television's rear part. Take away the old lamp cartridge and then insert a new one. Seal the lamp with screws, replace its cover and then screw tightly.
iF THE Problem persist you have to fix it the power supply inside.
God bless you

Aug 01, 2013 | Panasonic Televison & Video

1 Answer


Try setting a larger fan at the rear of the set pointed toward any vents you see on the lower cabinet area. If that allows the set to run longer than before, then the internal cooling fan has failed.
Those sets have hot spots in them and quiet fans to keep the air circulating.

Jun 23, 2011 | Panasonic Televison & Video

1 Answer

I have a 65H84 model TV and plan on moving it to a different room. This TV was in place when we bought the house from previous owners. Does the unit come a part in two sections for easier moving? Thank...

No,this thing come in as a whole tv unit,dosen't come aparts.U check the tv,see if it work,before going all the troubles moving it to another room.These DLP tvs design are notorious for it tv convergence problems and DM power supply board intermittently shutdowns alots.It bulky design and not work for free DTV over the air.

Feb 08, 2011 | Toshiba 65H84 65" Rear Projection HDTV

1 Answer

Tv turns itself off and on.

I just had this problem. The plastic back of the TV has a grated opening directly in the middle and towards the top of the TV. There is a fan directly behind. The grated opening was full of dust so air couldn't pass easily. I simply vacuumed the dust. I went the extra step and removed the whole back of the TV and vacuumed the entire space.

I assume the internal temperature exceeded its maximum so the TV turned it self off. Cooled enough to try a restart, heated up, ...

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Sep 29, 2008 | LG 32LC7D Television

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Sony KDF- 42WE655 Blinks 5 times No picture or sound

5 flashes, bad lamp and/or lamp driver
4 flashes, bad or stuck fan

Aug 25, 2008 | Sony Grand WEGA KDF-42WE655 42" Rear...

1 Answer

Problem with toshiba 65H84

Good Day, mowattearl;

The most common with this TOS TV is the failure of the convergence IC's, but rebooting, resetting first, unplug TV from wall for 3-5 minutes then plug back into wall. The "conv" IC's are STK's, large black devices mounted to a large heat sink on the verticle.

Good luck, big IRISH.

Jul 24, 2008 | Toshiba 65H84 65" Rear Projection HDTV

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