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How do you know if the bulb is going?

post #1 of 19
Thread Starter 
I have a Mitsubishi rptv. It's about 2yrs old. Lately, the picture doesn't seem as bright as it used to be. Now when a bulb starts to go...Does it get darker or does it just go?

Thanks!
post #2 of 19
I noticed mine getting significantly dimmer right before the lamp died.
post #3 of 19
It gets darker, and then it goes, so both. You obviously can swap out the bulbs if the imaging is noticeably dimming before it goes. I had a bulb in a Toshiba 52hm84 that I let dim too long and it ended up blowing. Of course this occurred during a MLB playoff game, top of the 9th inning, during a comeback. At least I was running my audio through a receiver, so I could listen while I let the TV cool and replaced the bulb.
post #4 of 19
The lamp actually looses lumens slowly thru its life cycle but near the end it seems to accelerate.
post #5 of 19
Thread Starter 
Any recommendations for a replacement bulb dealer? I have a bulb warranty through Mack Warranty. Also, how hard is it to replace a bulb?

Thanks!
post #6 of 19
Quote:
Originally Posted by zipbags View Post

Any recommendations for a replacement bulb dealer? I have a bulb warranty through Mack Warranty.

Thanks!

Make sure you read your Mack Warranty. They may either require that you obtain your replacement bulb from a particular dealer or directly from the manufacturer. Also, they may need to initiate the proceedings, rather than "reimburse" you.

When I tapped into the bulb replacement part of my warranty, it required that I call the warranty service, which ordered the correct bulb from Toshiba directly and had it shipped to me. After I received the new bulb, I needed to return the old bulb to Toshiba for verification and proper disposal.
post #7 of 19
Thread Starter 
Schroedk,

Thanks for the info. I just emailed Brian at Mack to find out the procedure.
post #8 of 19
Actually there are 2 ways you can go about making a claim with us for a new bulb.

1. Call us up and send in the old bulb with the appropriate paperwork and we will actually replace the bulb with a OEM bulb(we do not use aftermarket). whole process avg time is about a week. If you are using this TV for superbowl I would wait till the day after to start the claim.

2. call us up start the claim process. you can purchase your own bulb and send in the old one with the receipt of the new bulb and we will send you a reimbursement check. However the check may take up to 4-6 weeks to receive back. If your pressed for cash go with the first option.
post #9 of 19
Also there is a whole thread regarding the bulb questions and peoples experiences

http://www.avsforum.com/avs-vb/showthread.php?t=1088544

Check it out
post #10 of 19
Thread Starter 
Quote:
Originally Posted by mackcamera View Post

Actually there are 2 ways you can go about making a claim with us for a new bulb.

1. Call us up and send in the old bulb with the appropriate paperwork and we will actually replace the bulb with a OEM bulb(we do not use aftermarket). whole process avg time is about a week. If you are using this TV for superbowl I would wait till the day after to start the claim.

2. call us up start the claim process. you can purchase your own bulb and send in the old one with the receipt of the new bulb and we will send you a reimbursement check. However the check may take up to 4-6 weeks to receive back. If your pressed for cash go with the first option.


Thanks. I live in NJ where I believe you are from. So it should be pretty quick (delivery times).
post #11 of 19
Thread Starter 
Does anyone know what the bulb life for a Mitsubishi WD65732?
post #12 of 19
Quote:
Originally Posted by zipbags View Post

Does anyone know what the bulb life for a Mitsubishi WD65732?

You are going to get many different answers to this but really it all dependson how you use the tv and for how long. I have a Sony RP LCD that has been going on the original lamp for just over four years and then i've seen others last half that.
I never turn the tv on and off, if I turn it on I leave it on for at least twenty minutes so as not to stress the lamp and what is worse is what I call "strike-re-strike" where you turn it on then off and then back on. I've seen kids do this at friends house's. This stress is worse than actual hours.
post #13 of 19
Thread Starter 
Quote:
Originally Posted by mylan View Post

You are going to get many different answers to this but really it all dependson how you use the tv and for how long. I have a Sony RP LCD that has been going on the original lamp for just over four years and then i've seen others last half that.
I never turn the tv on and off, if I turn it on I leave it on for at least twenty minutes so as not to stress the lamp and what is worse is what I call "strike-re-strike" where you turn it on then off and then back on. I've seen kids do this at friends house's. This stress is worse than actual hours.


I've had the tv just under two years. I figure the sets on about 5hrs a day average. So I have around 4000 hours on the bulb. I rarely if ever turn the tv on and then off. I heard that turning it on and off is bad. So usually I will leave the set on if I go to do something for a bit.

Like I said in my first post. The picture just doesn't seem as bright as it used to be. So I am just not sure if the bulb is indeed dying.
post #14 of 19
Quote:
Originally Posted by zipbags View Post

I've had the tv just under two years. I figure the sets on about 5hrs a day average. So I have around 4000 hours on the bulb. I rarely if ever turn the tv on and then off. I heard that turning it on and off is bad. So usually I will leave the set on if I go to do something for a bit.

Like I said in my first post. The picture just doesn't seem as bright as it used to be. So I am just not sure if the bulb is indeed dying.


What you have seems to be called high hour dim
post #15 of 19
Quote:
Originally Posted by mackcamera View Post

What you have seems to be called high hour dim

Which means..?
Edit: I think I know what it means but from that point on, how much bulb life can he expect?
post #16 of 19
Quote:
Originally Posted by mylan View Post

Which means..?
Edit: I think I know what it means but from that point on, how much bulb life can he expect?


the bulb expectancy is 2000-4000 hours so there is no definitive answer. it can be 20 minutes left or 400 hours but usually when the dim is getting noticeable it means its getting close to kicking the bucket
post #17 of 19
Thread Starter 
Quote:
Originally Posted by mackcamera View Post

the bulb expectancy is 2000-4000 hours so there is no definitive answer. it can be 20 minutes left or 400 hours but usually when the dim is getting noticeable it means its getting close to kicking the bucket

Would I be able to send the bulb at this stage back to you..Or do I have to wait until it goes completely?

Thanks!
post #18 of 19
Quote:
Originally Posted by zipbags View Post

Would I be able to send the bulb at this stage back to you..Or do I have to wait until it goes completely?

Thanks!

no you can definitely start a claim now but if you send it in today or tomorrow I just want to forewarn you the tv will probably be out till after superbowl
post #19 of 19
Thread Starter 
Quote:
Originally Posted by mackcamera View Post

no you can definitely start a claim now but if you send it in today or tomorrow I just want to forewarn you the tv will probably be out till after superbowl

No. I will do it in the next week or so. Thanks!
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