Mitsubishi HC7900DW owner's thread - Page 44 - AVS Forum | Home Theater Discussions And Reviews
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post #1291 of 1303 Old 12-16-2016, 10:20 AM
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Haven't replaced my lamp yet. My original is pushing 9900 hours and still going. I have a replacement ready to go buy might try the bare bulb if I still have this projector for a 3rd lamp replacement.
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post #1292 of 1303 Old 06-14-2017, 11:39 AM
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So I replaced my bulb again after it hit 5k hrs and shut off. That was 2 weeks ago, I left on vacation before I replaced the lamp. Well I'm back home now and I replaced the bulb and reset the timer....and the picture just doesn't seem very bight. I've made sure all the settings are up so that I'm running in standard mode n everything but it just doesn't look bright at all. Its cloudy out today and the blinds are all down and closed and the wife n daughter both agree it doesn't look right.

Is there something I'm missing on doing after the timer hits 5k hrs and shuts down??
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post #1293 of 1303 Old 06-14-2017, 08:49 PM
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Quote:
Originally Posted by Jason136969 View Post
So I replaced my bulb again after it hit 5k hrs and shut off. That was 2 weeks ago, I left on vacation before I replaced the lamp. Well I'm back home now and I replaced the bulb and reset the timer....and the picture just doesn't seem very bight. I've made sure all the settings are up so that I'm running in standard mode n everything but it just doesn't look bright at all. Its cloudy out today and the blinds are all down and closed and the wife n daughter both agree it doesn't look right.

Is there something I'm missing on doing after the timer hits 5k hrs and shuts down??
Where did you get the replacement lamp. Is it a genuine Mitsubishi lamp assembly? The new lamp may be defective or even a counterfeit. Some suppliers claim the 230 watt lamp for the 7800 is the same but the 7900 is supposed to be a 240 watt lamp. OSRAM P-VIP 240/0.8 E20.8 240 0.8 E20.8 is the correct bare bulb.

"Smart enough to know better, to old to care" ------ Dedicated Bat Cave Home Theater, JVC RS49U/Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 18TB DroboFS NAS
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post #1294 of 1303 Old 06-16-2017, 03:50 PM
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I got the lamp from ProjectorLampsWorld. Its the lamp and housing. VLT-HC7800LP-Odoga
I've gotten one before from ProjectorPeople.com lamp and housing and its showing the same part number as the one that I have now. Only it was bright like its supposed to be....oh well...what do ya do? Go to where you got it from in the past I reckon!
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post #1295 of 1303 Old 06-16-2017, 07:13 PM
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Quote:
Originally Posted by Jason136969 View Post
I got the lamp from ProjectorLampsWorld. Its the lamp and housing. VLT-HC7800LP-Odoga
I've gotten one before from ProjectorPeople.com lamp and housing and its showing the same part number as the one that I have now. Only it was bright like its supposed to be....oh well...what do ya do? Go to where you got it from in the past I reckon!
I would call them and say, the bulb you received from them is too dim fo a brand new bulb and ask them to send you a replacement for it.
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post #1296 of 1303 Old 08-28-2017, 09:54 PM
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My bulb just grenaded itself with <3000hrs on low...
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post #1297 of 1303 Old 08-29-2017, 07:57 PM
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Originally Posted by whitrzac View Post
My bulb just grenaded itself with <3000hrs on low...
I had one explode at about 3K hr on low, it was an OEM bulb in a generic housing so don't know how genuine it was, replaced with an OEM bare bulb and am now at about 3K hrs and its still fairly bright. The original lamp and housing has about 3.5k hrs on it still works but getting dim.

"Smart enough to know better, to old to care" ------ Dedicated Bat Cave Home Theater, JVC RS49U/Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 18TB DroboFS NAS
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post #1298 of 1303 Old 01-30-2018, 10:55 AM
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Recently I got an NVidia shield TV hooked up to the projector. Of course it attaches to my Denon receiver first. Now every time I switch the receiver to the input the shield is on it immediately kicks the projector into 3D mode. The projector for some reason thinks the Shield TV is sending it a 3D signal.
Dose anyone else have a Shield TV hooked up to their Mitsubishi and having this problem? I would really like it to stop doing this.
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post #1299 of 1303 Old 07-03-2018, 03:02 AM
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Hi guys

Having similar issues as the quoted posts. TViewer suggests that the mainboard was defective. Not sure if bigrig got to the bottom of his problem to confirm this. Wondering if anyone else has had the same symptoms and if so how they went about fixing it and cost involved?

Symptoms: Projector suddenly stopped (maybe a power surge). Was able to turn it on a couple of times after this but only after waiting a day and it turned back off straight away. Now it doesn't turn on at all. No motor or fan noise, no light. Power and status lights both green (not blinking).

I tried resetting lamp - it didn't work.

My projector was bought more than 2 years ago so I imagine it isn't under warranty.

Thanks
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post #1300 of 1303 Old 07-03-2018, 03:04 AM
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Dead projector

Quote:
Originally Posted by TViewer2000 View Post
If you have a copy of the service manual I wouldn't mind taking a look at it. My projector was doing similar things like yours and it turned out to be the mainboard was defective. Even the replacement board that was installed to fix the problem was defective. 3rd try and it was up and running. So that could be the problem. The projector does produce error codes but you have to watch out because some of the codes have double meanings which can steer you in the wrong direction if you are not aware of it.
Quote:
Originally Posted by bigrig View Post
Hey fellers -

I've been enjoying the Mits for almost 2 years now, but now it's having an issue. It stopped working while the kids were watching a movie.

I unplugged it and cycled power - if you hit the power button the Power and Status both turn green, but no fan and no light. And I have to pull the cord to power down.

I pulled the bulb and checked it and put it back in - it looks normal but I guess that doesn't mean anything. I tried the Reset Lamp Hours sequence, but that doesn't seem to do anything.

I guess it might need a new bulb? But isn't the Status light supposed to turn red to indicate that?

Thanks for any suggestions!

Matt
Quote:
Originally Posted by speaktome View Post
Hi guys

Having similar issues as the quoted posts. TViewer suggests that the mainboard was defective. Not sure if bigrig got to the bottom of his problem to confirm this. Wondering if anyone else has had the same symptoms and if so how they went about fixing it and cost involved?

Symptoms: Projector suddenly stopped (maybe a power surge). Was able to turn it on a couple of times after this but only after waiting a day and it turned back off straight away. Now it doesn't turn on at all. No motor or fan noise, no light. Power and status lights both green (not blinking).

I tried resetting lamp - it didn't work.

My projector was bought more than 2 years ago so I imagine it isn't under warranty.

Thanks

Edit: Wasn't sure how to do a multi-quote post. Hopefully this works.
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post #1301 of 1303 Old 07-03-2018, 12:11 PM
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Quote:
Originally Posted by speaktome View Post
Edit: Wasn't sure how to do a multi-quote post. Hopefully this works.
Hi,

sounds like a power supply/ballast problem rather than a mainboard problem.
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post #1302 of 1303 Old 06-22-2019, 02:24 PM
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On third bulb and added Darbee to sharpen image

This projector has been a workhorse for me. On my third bulb with just over 10k hours on it (Replaced original with OEM Osram bulbs and did replacements myself). I recently added the Darbee Darblet ‎DVP-5000S to my video chain and I'm even more impressed with the image. Will hold me over until I absolutely feel like 4k will make a huge difference.


Bulb I used twice, but last time I had to use P-VIP 230/0.8 E20.8 as the 240 is no longer available. I don't really see a difference, but supposedly P-VIP 240 was slightly brighter. Obviously new P-VIP 230 is way brighter than 5000 hour P-VIP 240.
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I need to take some better images, but you should be able to see enhanced definition with Darbee
Darbee at 60%
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Darbee at 0%
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post #1303 of 1303 Old 06-23-2019, 12:07 AM
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The P-VIP 240 is still available as I just bought one last week. I am on maybe my 5th lamp and have bought from this source several times with no bad lamps. I bought a used one for $20 with supposedly less them 100 hrs and it was bright at first but after 800 hrs it was dimmer then my old 4000 hr lamp definite rip off.
https://www.ebay.com/itm/NEW-ORIGINA...72.m2749.l2649

"Smart enough to know better, to old to care" ------ Dedicated Bat Cave Home Theater, JVC RS49U/Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 18TB DroboFS NAS
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