Question about Toshiba 52HMX84 52" Rear Projection HDTV-Ready Television

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No Picture My toshiba 52hmx85 has trouble on lamp, there is a sound but a picture. what I found was the indicator is on blue flash and red on. but before checked by technician it is blue off and red flash, they said it was a DMD problem. so, I like to know how to check out the problem. I already opened the cover and checked the fuse for lamp and the temperature sensor are ok. Thanks a lot.

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Thank you so much for you replay, Samtech.

I have two lamps , I think the lamp is ok. it seems something wrong inside of tv. I had open it and check. But I dont have maintenance manual. I'd hope someone can give some suggestion where I have to check for locating the problem.

Thanks again.

Posted on Dec 21, 2007

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  • 16 Answers

Was the lamp replaced? They're not always shattered inside...Sometimes they look ok and are defective.

Posted on Dec 21, 2007


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Posted on Jan 02, 2017

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Installed new lamp. When powered up blue solid light and yellow blinking light (15x) , tv would torn off and on several times trying to light lamp. Once that failed red blinking light and yellow solid...

Hi Genaro,

Blue led light lit solid and yellow led light flashes is an initial attempt of the set to re-light the lamp.Red led flashes and yellow led light solid means that the lamp won't light up that's why it only has sound without the picture.
Since you've replaced the lamp twice and still the symptoms persist, I suspected that the fault came from the ballast board and not on the lamp itself. If the ballast board gone to malfunction, there's no high voltage will produce to light up the lamp and will sensed by the processor and trigger the error code (Flashes/solid led light with color code).

To verify whether the ballast board is faulty or not, check if the lamp will lit by looking through the lamp door louvers at the rear of the cabinet upon turning on the set.
Please let me know what you will find to assist you further.


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All the troubles I've seen with this model are because of the LIFI lamp. Panasonic warrants the lamp assembly for four years from date of purchase. Call Panasonic toll free hotline or go online for an authorized warranty shop. Good luck

Bill W

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Blue light remains lit but lose picture. no other indicator lights flash. if i unplug the tv it will restart but lose picture again after half hour

I have a toshiba 50hm67 tv and with mine the blue light would come on and I would hear sound first and then the picture would finally come on... this happend for about a month.... next the yellow and blue light would come on but the pic still wouldn't come on until it clicked off and on by itself for about 10 min this went on for about a week. All of a sudden last night the red lights by the power light started blinking. No tv now and when the tv shut off it said lamp not working.

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You could have gotten a defective lamp. Try another lamp. Since you have a Toshiba youll be using it even if you don't need it now. Toshibas have short lamp life. If lamp does not fix then the light engine will have to be removed and sent to Toshiba to be rebuilt. They are no longer available.

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No sound or picture, 2004 pt50dl54j

remove back panel. blow out all the dust from all the components except the fan on the right.
Vacuum out all the dust.
Have you replaced the lamp? that would help too.
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You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen problem, read this and follow the instructions.

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Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
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Check out for parts, repair service and DIY info.

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