Question about BenQ DX 650 Multimedia Projector

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Lamp Indicator My BenD DX650 projector turns on fans come on and then I get a lamp light and the on button flashes I sent the bulb in and had it refurbished. Still have same problem This is the second DX650 i've had with this problem. returned the 1st one for exchange. Is there a problem with the lamp monitor circuit on these units?

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Hi there

There is a problem with the Powersupply on these which causes the exact problem you are having

Posted on Apr 02, 2008

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If the bulb expired while on the unit could have surged and the lamp preheat circuit as well as sensor could have burnt out as well. This is a common problem in more than one brand of projector.

Posted on Jun 15, 2009

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1 Answer

The indicator of temperature is red, the indicator of the bulb is off and the fan after 3 o 5 minutes


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Dec 14, 2015 | Office Equipment & Supplies

1 Answer

Blue light flashes, lamp doesn't light


1,Check the fans ,whether the fan is running,when you turn on the projector
2,if the fans run, then ,check the lamp or lamp ballast

We supply original projector parts: lamp, bulb, Lcd

panel, Lens, DMD chip, color wheel,
motherboard, powersupply ... with high quality and

competitive price.
any questions, feel free to contact me
have a nice day!
Jerry Lampdeng Lim

Mar 04, 2014 | Epson ELPLP69 - V13H010L69 Projector...

1 Answer

When I turn it on fan runs and clicking noise but lamp light flashes yellownis this the bulb like to make sure before I spend that much money for one


Check with the Sony service center that serves your area. Generally when the lamp indicator flashes, it's either due to a bad lamp or the connections to it...

Nov 03, 2013 | Sony VPL PX30 Multimedia Projector

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My sanyo PLC-sw20a lamp does not light after turning on, the red lamp indicator still lighted and there is no indication for lamp replacement. Is the lamp busted?


1,Check the fans ,whether the fan is running,when you turn on the projector
2,if the fans run, then ,check the lamp or lamp ballast


We supply original projector parts: lamp, bulb, Lcd panel, Lens, DMD chip, color wheel,
motherboard, powersupply ... with high quality and competitive price.
any questions, feel free to contact me
have a nice day!
Jerry Lampdeng Limited

May 20, 2011 | Sanyo PLC-SW20A Lamp

1 Answer

Power indicator /red/ and warning led/red/ are lighting after ea 15 sec. a lamp never start and fans goes in OFF mode. I checked power supply lines S5V,S-5V,S16V on the Main Board . I checked unit lamp...


If power indicator light red and warning indicator red flashing than according to user manual :-
The projector has been cooled down enough and the temperature returns to normal. When turning ON the projector the WARNING indicator stops flashing. CHECK AND CLEAN THE AIR FILTER.
Experience:- 1. if the temperature is very low than temperature sensor maybe misbehave.
2. If anyone fan not working
so please you check fans.
(If lamp or lamp ballast unit faulty than after a time period the lamp indicator light ON not a warning indicator. I experience many times if any fan in projector are broken or jamed the temperature light if present otherwise warning light ON or flashing)

Jan 20, 2011 | Sanyo PLV-Z4 Multimedia Projectors

1 Answer

After changing the bulb image will not come on and solid orange light appears


Other then POWER BUTTON light there are three lights more
1. lamp indicator
2. temperature indicator
3. computer input
witch one light is flashing RED or illuminated RED with POWER BUTTON orange light.
If LAMP INDICATOR light is illuminated RED than lamp runtime has reached 1800 hours. but projector still working.
If LAMP INDICATOR light flashing RED than lamp circuit failure, or abnormal function or lamp unit is damaged. In this case projector doing the same behave just like your projector.
if TEMPERATURE indicator illuminating RED the projector still projecting and if flashing RED than turned of itself

Jan 11, 2011 | Panasonic PT-LB50U Multimedia Projector

2 Answers

Optoma EP755 new lamp when power standby button


you need to reset the lamp timer, usually done by holding some buttons while turning on

Mar 10, 2009 | Optoma EP750 Multimedia Projector

1 Answer

Dell 2300mp projector


check this out...
http://www.ihatedell.net/forum/phpBB2/viewtopic,p,36316.html
have almost the same problem. lamp light turned on-->replaced the bulb, now when you turn it on tryies to boot and then the lamp light is on again (but the bulb is brand new).... and no light at all coming out of thing... I guess dell just don't know how to built projectors right way.... and theirs tech support guys are.... they just don't know about projectors more then manual

Jun 20, 2008 | Dell 2300MP Multimedia Projector

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