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I ordered a replacement bulb, and found that I had no idea how to replace the bulb in the cartridge, or if I even should try. Do I need a whole new cartridge?
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Yes, the lamps are made to be for most models replaceable by the owner.
Most the lamp is located up front behind the cover below the screen (Model number?) and you remove a door, back out two (usually Allen bolts) and the whole cartridge with lamp pulls out (has a handle).
To get a idea of lamp price Google the model number with "lamp".
You Tube has video instructions for replacing the lamp for most models---Get a original Sony replacement and not a generic one.
Bulbs are sold either loose or the whole thing with the cartridge--get the cartridge as easy to replace.
On right side as you look from front is door secured with at least one screw; with set unplugged remove door and two more screws behind it that secure the lamp cartridge (it has a handle) and carefully pull it out----replacement lamp comes in one of two ways= just the bulb or the bulb with the cartridge.
Get the one with the whole cartridge, much easier to replace and "generic" ones are no bargain as they usually have a shorter life.
Carefully insert the new cartridge in being sure the two pin plug on the back engages correctly; NEVER TOUCH THE FACE OF THE LAMP WITH YOUR HAND as oil on your fingers can damage the lamp when it operates.
If you search the internet with the model number you will find a lot of sources for a replacement lamp.
The problem is not over-heating. The Optoma HD72 has a known problem that Optoma won't advertise. The lamp driver is faulty. They simply have to replace the lamp driver. I purchased a spare lamp with my original purchase. I had the exact same experience as you at around 1200 hours on the lamp in ECO mode. I used the spare lamp. Same thing happened at about 1200 hours. I had a friend at Optoma. he confided to me the problem. I sent it in and they replaced the lamp driver at no charge. I got another 800 hours out of the first lamp and am now using my second lamp and have about 600 hours on it. The pic quality is so good with this projector (used Digital Video Essentials to calibrate) that I'll just order a bare lamp or two and use the existing lamp housings when I need a new bulb.
its very simple small cover on back of tv remove this to replace lamp as its inside new lamp is available a www.replacementlightbulbs.com just be sure to order right one check last digits on seriel number should be a J or Z that will tell you the one to order to reset lamp light push menu then enter
90918988
You lamp bubl has burned out. You need to replace the bulb. you can order a new bulb on line by searching the web using your model number bulbs are about $110 if you reuse the cartridge and replace the bulb only. replacing the whole cartridge and bulb is around $ 200
When you order the lamp assembly, it should come with complete instructions on how to replace it. Most have pictures as well. The part number is: AZ684020 and cost $437.74 from tritronicsinc.com. You may be able to find a generic replacement for less money.
I had the same issue when replacing my lamp for the first time. I replace just the bulb with the Phillips replacement bulb. After installing the power down issue started and it would take up to 7 attempts before the TV would stay on with a picture.
Since I never had this problem until i replaced the bulb i decided to send the new bulb back and replace it with a difference one. In my opinion replacement parts are never made to the same standard as original OEM parts. This TV is definitely very temperamental in regard to the bulbs.
When the second replacement bulb arrived I decided to not only replace the bulb I also cleaned the connector plug in the cartridge with a QTip and alcohol. I did the same for the plug receptor in the TV.
When I replaced the bulb i insured the the top of bulb lettering was facing the handle of the cartridge so when you put the cartridge back in the TV the top of the bulb would be facing you.
I also cleaned the entire inside of the TV where the cartridge is inserted including the screws.
Once I did all this the TV turned on the first time and has been working fine for three days now.
I do believe the replacement bulb position is very important as to how it heats up and determines when it needs to cool.
I hope this helps others with the same success i had because I really do not want to replace this TV and start replacing all the parts others have done with little to no success for this issue.
the reflector on the new bulb must be the same length/height. or your beam will be off center normally causing gray areas. Most likely you did not seat the tray/carrier correctly be certain the lamp is seated fully. never touch the lamp with fingers as the oil will make hot spots. pull out re-seat the tray again.
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