I have jvc replaced bulb but picture is still very dark if not bulb then whay would cause the dark picture not bright or vibrant

SOURCE: Dark Screen

The lamps in these normally last about 3000 hours (if your really lucky). The bulb will start to loose it brightness as a matter of due course at about the halfway mark. It maybe that you are running the unit in the non economy mode that they are fading faster then normal.
The sets have a reputation for not being good with lamps though.

Have a look at the lamp though, make sure it has been off for at least an hour to let it properly cool and check for dust that has settled on it. Also if you wipe the lamp, make sure it is with a dry cloth, or allow plenty of time for any moisture to completly dry before turning it on if you use a damp cloth.

SOURCE: JVC Projection Television HD 52G886

Hello jenniferjz20,

This problem seems like it may be related to the HV section or the video section. The HV section would effect the voltage at the ancde of the CRTs, while the video section would effect the video level at the cathode of the CRTs. My experience tells me that the HV section is more then likley the cause. I would suggest that if you have a HV probe use it to test the HV level on each of the CRTs this will tell you if the HV section is working correctly. Then test the video signal level using an oscilloscope on the CRT socket at the pins corresponding to the video input (Cathode).

If you do not have the equipment to do this nor a background in electronics I would suggest that you have a TV technician repair this for you.

I hope this helps
Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

SOURCE: JVC HD-61Z456 Television to dark

Most likely a bad Polarizer within the light engine of which you cannot buy. The entire light engine would have to be re-built or replaced and they usually start around $600.00....

SOURCE: my JVC 56G787 is dark and bright is turned all the way up

replace the bulb and clean the inside mirror and screen. Use a microfiber cloth to clean both and vacuum any dust from inside unit. made me mad as well

SOURCE: my jvc model #hd-61z456 is

Both times bulbs was replaced it lasted 1 1/2 or 2 years right?Use tv on like 4 or 5 hours a day?That the avervage life span of a projection bulb.Try to buy an original JVC pojection bulb last little longer.