Top 20 Toshiba 57H81 57" Rear Projection Television Questions & Answers


No you can not take the screen off to look inside. These sets are accessed from the rear, however do NOT attempt this on your own as there are fatally dangerous voltages present.
Visual anomalies on a projection TV are due to bacteria growth in the projection coolant.
Frankly it is cheaper to throw this away and replace with a modern flat screen that can be hung on your wall.
Here is one for $329
https://www.bestbuy.com/site/toshiba-55-class-54-6-diag--led-1080p-hdtv/5861001.p?skuId=5861001

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Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

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you may have a bad projection bulb. You can order one on line

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SHIPJIMMY.COM

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9f2965aa-94e3-4244-a87e-5f0264d7f11c.jpgthe price of the parts depend on the problem I have done a problem part list on to this picture hope this help most of the parts if you type them into ebay the parts will come up check them to the one on the board. sorry had to change the size of the picture as it has to be under 500k. switches are in the red ring if they don't click when you try to turn on or just keep clicking then i would check them. you should be able to download the picture and enlarge the picture so you can see the problem areas i have put on it hope this helps there is a bit of soldering to do to replace them if you need more help please reply.

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Hello,

Projector TV's have a tube for each function e.g. Video 1, Video 2, TV. Does the TV just not work or the VCR<DVD<Game console modes not work as well? If one works and the others do not you should be able to replace that tube, module, piece.

I hope this helps.

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Have you checked the switch on the lamp housing has to push the switch so it can be switched on. sometimes the case does not hit it.

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Touch focus adjusts at a limited number of places the convergence--next time it does this go into menu with the remote and look for CONVERGENCE in the menu, you will be able to call up a grid of lines or crosses--point here is to see if red or blue are out of position, if so with the remote adjust there and see if it stays when next turned on.

I tell most people with this brand NOT to use the touch focus--it tends to misadjust things and does not SAVE the adjustments it makes---the ones in the customer and hidden tech menu will be saved.

Checking to see if a convergence problem and if so adjusting manually is the first step---may solve your problem and do not keep using the touch focus----its a joke in the repair industry.

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change the 10 or so surface mounted bad filter caps in the Hyper module this set uses--the board is no longer available--it can be sent out for rebuild (not toshiba) but that is rather costly (200+)

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Set will have a "HYPER" BOARD causing this issue----there was a service bulletin with a photo of the board with 10 surface mounted filter caps that dry out and need to be replaced.

The failing caps tend to begin to regain capacitance when hot---gradually the wait gets longer and longer.

Board no longer available from Toshiba so 3 choices: replace the caps yourself (tricky and not easy) or have it sent for rebuilt to PTS electronics (about 200) or go shopping for a new set and retire this one.

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i would take the speakers out, the amplifier my have went out, back there you will find them both hooked up to the amp un plug them and the ground or it will make a horrible popping noise.. hook it up to a home theater system (bought my toshiba rp with no sound for $50 did just that now i have an awesome tv. just trying to get rid of a glow around the white letters.

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the problem on your tv is the convergence ic , this parts need to be replace is not an easy fix , you need to hire a tv tech normal cost about $200

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Does the Red Tube light up along with the green and blue Tube??

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Pop off front speaker grille, there are 1/4" hex screws holding the screen on, and a connector that needs to be disconnected first. The 1/4" hex screws in the back and sides along the mid section also need to be removed, then the entire top lifts off - be careful, the screen separates from the black plastic part (you might want to lift off the front screen first, that way you can be sure you have all the screws removed.) There was the black power section that was screwed in that needed to be wiggled off first, then the top just slides off easily. Easy to clean and reinstall by putting the black part on first, then sliding the screen up, over, then down onto the black plastic part. Replace all screws and reconnect the connector.

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Set is in shutdown---most common reason on this model is shorted convergence IC's--set uses 2 of the STK-392-110 chips.

About the only way to know is have someone get at them and unsolder all the pins on both chips---if set then turns on (will look very bad) one of the chips is bad and both must be replaced.

Short of that it is a shop repair.

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Based on model number if have sound but no brightness the set is blanking or shutting the 3 tubes off because of a problem that could damage them.

Set needs to be inspected either in the home or a shop.

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Hello
Check and make sure that the speakers are good. If speakers are good, suspect the power amplifier output seciton of the device.

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the signal board for that model is a PD1146D toshiba part number 23788898

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