Question about Akai PT50DL24 Television

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Bad fan No picture and the lamp is new

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Di you replace the ballest that power up the lamp

Posted on Nov 21, 2013

  • Robert Smith Nov 25, 2013

    yes it could be the fan if the fan it not wroking it will not trun on at all.the cpu will sent that the fan is not runing and then trun it back off..



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HL-S5687W looses picture and sound after heating up. When I change the channel, the picture returns. The fan is not coming on.

This does not but does in one way make some sense(I had to read your question a few times).

The key here is the fan does not turn on-----If any of the fans (lamp or others to a lesser degree do not come on: The lamp fan must come on or in a short amount of time--it should turn the set off and some have a lamp light and a temp light----

The set monitors the temperature of the lamp especially when set is turned off---it will not turn the lamp off until it cools to a specific temperature is reached----hence if set on for while and just unplugged which will kill the power to the lamp fan the lamp or even ballast that drives the lamp can be damaged.

Voltage to the fan can be measured and it must come on when set is powered up-----issue could be either fan is bad or no voltage is reaching it===most 2 wire fans will have the voltage marked on them--24vdc equals 24 volts Direct Current etc.

If a fan NEVER COMES ON (especially the large lamp fan) sooner or later something is going to get melted or fry.

Your description is a very good one but the issue is a bit rare (fan dead).

I would if there first check for voltage at the fan when set is turned on---if its there but fan not running the fan is bad.

Seen a few where dirt on the fan or even moving the fan blades made the fan kick on but by then you KNOW it is bad.

Let me know if you have questions or what you find.

May 24, 2012 | Samsung Televison & Video

1 Answer

Samsung p6163wx - lamp sign flashing with a loud noise fan on, no picture. Replaced with a new bulb - did not solve the problem

This set may use a color wheel if it has a lamp. A bad color wheel will make a fan like or high pitched sound.

If the wheel actually shatters (it can) the set will not function and will turn the lamp off.

See photo of color wheel and if you need to know I can tell you how to look at it.


Mar 14, 2012 | Samsung Televison & Video

1 Answer

Replaced lamp and i still have a yellow light and no picture

Check that your lamp fan is working. It may also be a bad ballast for the lamp.

Mar 08, 2012 | Toshiba 65HM167 65" Projection Television

1 Answer

Lamp went bad so i replaced it.the picture is like new really looks good.2 weeks later the tv will not stay on for more than 10 mins.turn it back on stays on rest of the it will not stay on for...

First You have to check the lamp cooling fan. if the fan didn't run at the correct RPM then the lamp will not get proper cooling and the lamp will get over heated. This will result in termal shutdown. And the tv will go to standby to prevent from burning the lamp. Just replace the fan. If the problem remains after replacing the fan then the problem is wiih lamp blasting circuit. If so you have to replase the lamp blast.

Aug 07, 2011 | Mitsubishi WD-65735 Television

1 Answer

Power light flashes 4 times and the lamp light flashes 2 and there is no picture..... do we have a bad lamp?

IF your Fans are running then your ballast board is not working replace it. A Bad Lamp Fan can also keep set from turning on otherwise your lamp needs replacement

Dec 11, 2010 | Toshiba 42HM66 42" Projection HDTV

1 Answer

Replaced lamp, tightened back plate, but lamp light still flashing and no picture.

A Blinking Lamp LED is the most common failure indication. It can be caused by a bad lamp, a bad Ballast, Color Wheel not operating, Fans not turning, or even other defective Boards. I would suspect the Ballast or fan first though.
Hope this helps,

Jun 28, 2009 | Samsung HL-P5063W 50" Rear Projection HDTV

1 Answer

Toshiba 44NHM84 has no picture just red flashing standby light

during transportation your TV was suddenly shock. then causes your TV lose connection on main circuit board. trust me!

May 21, 2009 | Toshiba 44NHM84 44" TV

1 Answer

55 in loewe articos rear projection

You might have defective Fan if Fan stops running Lamp will not Light also keep in mind Ballast board it what turns lamp on and Fan is what keeps Lamp cool, and most of the time if set is not comming on Lamp is Bad. Call Encompass Parts 1-800-638-3228 or UED 1-800-648-6657 main 3 parts to DLP is Lamp,Ballast board ,Lamp Fan.Id say you have Bad Lamp! God Bless and hve a wonderfull Day.

Nov 02, 2008 | Loewe Articos 55 55" Rear Projection...

2 Answers


You need the LSYC0022 kit to. To prevent lamp bad again

Jun 09, 2008 | Panasonic PT-50LC13 50" Rear Projection...

1 Answer

JVC TV lamp indicator light blinking new lamp

if you purcased a LTI lamp then the possibilty of a bad lamp may be the case. LTI lamps are cheap and are poorly manufactured. if it is a JVC lamp then you may have further problems such as lamp balast, or thermal sensor. clean the fans and filtersfor better air flow. keeping the lanp cool is important for the life of the lamp.

Apr 19, 2008 | JVC HD-61Z575 61" Rear Projection...

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