Question about JVC HD-52G786 52" Rear Projection HDTV

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Optical unit I have only had my JVC for just over 2 yrs this last fathers day. I am very disappointed when i found out the optical unit is out. quoted $1409 for part and $299 to install. obviously the tv isnt worht that. does anyone know how i can save this tv for cheap. or get this fixed. Problem: screen is a darkl blue. cant get menu ot input to pop up manually. nothing. i replaced bulb eith no luck. any one help. or i will take tv to dump thanks Dan

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I have the 52G786. These JVC HIDLA (LCoS) rear projection TV's are very trouble prone. Mine was in the shop 3 times in the first year. Now at three years old, the screen is getting dim then bright and flickering back and forth, but it's not the bulb.

You can now get a 50" 720p plasma for just under $1000, so that's the direction I am going. Fixing it is just asking to throw money out the door because it is likely to break again.

Posted on Oct 24, 2008

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II have a mitsubishi . Model number 57734 and it is getting white dots on upper Right of the screen . The dots are multiplying by the day . And now tv will not even turn on . Unit is about 4 yrs old .


The dots are most likley the optical Block ( light Engine ). The not powering up issue could be numerous items , have you tried accessing the self diganosis feature with the power indicator blinking an error code?

Jul 21, 2011 | Mitsubishi Televison & Video

1 Answer

Digital input not working and greyed out on the menu.


Most JVC TV's with HDMI and Digital Input have an optical sensor inside the case to sense if someone is trying to bypass the hardware encryption. My JVC was exposed to sunlight prolonged sunlight and triggered this optical sensor which disabled my HDMI ports. This may be the same situation for you.

JVC HDMI Port Fix

Turn the TV on, and enter the Service Menu. Select 2 for Self Check. Then turn the TV off, and after the fan turns off, unplug the power cord. Reconnect the power cord, turn the TV on, and the HDMI port is re-enabled.


Here's how to get to Service Menu:

Before entering the SERVICE MENU, confirm that the setting
of TV/CATV SW of the REMOTE CONTROL UNIT is at the
"TV" side and the setting of VCR/DVD SW of the REMOTE
CONTROL UNIT is at the "VCR" side. If the switches have not
been properly set, you cannot enter the SERVICE MENU.
1) Press [SLEEP TIMER] key and while the indication of
SLEEP TIMER 0 MIN is being displayed, press
[DISPLAY] key and [VIDEO STATUS] key (Fig.2)
simultaneously.
2) The SERVICE MENU screen of Fig.1 is displayed.
3) Verify what to set in the SERVICE MENU, and set
whatever is necessary (Fig.1).
Refer to the SERVICE ADJUSTMENT for setting.
4) Press the [BACK] key to return the SERVICE MENU.

Dec 12, 2010 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Replaced the optical block a few years ago to correct the yellowish hue problem. Recently I had to replace the lamp. I had bought one new about 2 years ago. I put the lamp in and the TV is much dimmer than...


Lamps only last Between 5,000 hours some last 8,000 hours
So what that means For Every hour TV is Playing it is burning up hrs of lamp. These sets are not like projection that you can run day and night .
Most Lamps need replacing every 2 yrs Depending on how many hours you watch TV?
It could be that the Lamp you have is defective ,Mats has Lamps for $99.00 1-800-628-1118
Get New Lamp then see if that corrects the problem.

Sep 18, 2010 | Sony KDS-R50XBR1 50" HDTV

1 Answer

My jvc model #hd-61z456 is working at too dark of a picture. I have replaced the light bulb twice and have reset the picture setting to factory setting and I don't know what else to do can you help me....


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.

Sep 12, 2010 | JVC HD-61Z456 Television

1 Answer

Ours is 2 yrs old.TV turns off by itself every 2-3 min.


U replaced the projection lamp the last 2 years?U used the tv on and watches 4 or 5 hours a day?Yes,the tv projection lamp life is over.Require changing a new projection lamp.

Aug 03, 2010 | Hitachi UltraVision 60VF820 TV

1 Answer

What would cause my jvc tv have a green tint


It sounds like you can have optical engine issue. That's if green tint was show up very gradually, until one day it really caught your attention.Normally some parts of the screen more green than other. It should get progressively worse. To solve this issue optical engine have to be replaced. It is pretty expensive repair if your TV is out of the warranty.
In case if tint appeared suddenly in one moment - you can try to check component cable connection on the back of your TV if you are using one ( green, blue and red colored). Sometimes it's loose or after disconnection people reconnecting it in wrong way.
Experienced tech will determine if optical engine is bad by running test patterns in special service mode. If green tint present on Grey scale - optical engine is bad.
Sorry for bad news.
Regards.
Russ.

Apr 06, 2010 | JVC AV-56WP74 56" Rear Projection...

1 Answer

How 2 fix JVC AV-65WP74


Sounds like a vertical IC failure. I would try replaceing the IC that may repair the issue.

Dec 31, 2009 | JVC AV-65WP74 Rear Projection Television

1 Answer

Screen is green


You probably have the infamous green blob optical block problem. There was a lawsuit on this for the previous generation. Sony warranties the optical block for 2 yrs from date of purchase, but not labor. Expect $350-$500 in labor...

I have it too...These tv's are horrible quality. I will NEVER buy Sony again.

Jul 18, 2008 | Televison & Video

1 Answer

High temp warning


There are 3 fans in this unit, and 2 are on the rear of the unit. The one that may be a concern for you however is directly over the Optical Block it is inside the unit. That may be the reason for having 2 replacements in such a short time.

Apr 05, 2008 | Sony KDS-R50XBR1 50" HDTV

1 Answer

55 in Sony KDF55WF655 Goes to standby and red light blinks 4 times


Check the thermal sensor fuse part# 1-910-023-93 or possibly one of the four fans. If the unit goes into Fan/Thermal Protect shutdown (4 blinks) it can be difficult to determine the cause since the unit turns off too quickly to troubleshoot. Solution: Ground the data line by inserting a jumper between pins 3 and 6 of CN44 on the H4 board. This overrides the protection circuits for troubleshooting. Do this right after turning the unit on and as soon as the lamp is seen lighting. Check pins 2, 5, 8, and 11 of CN6000 on the G2 board for less than 1VDC. Any voltage higher than that indicates a faulty fan. If all voltages are within specs, the H4 board must be replaced. If a fan is found defective, the optical block will need to be replaced if it is located inside the assembly. H4 Board Part Number: A1054674A Replace the following part based on which pin of CN6000 is out of specs: Pin 2: Fan 1 (part of optical block) Pin 5: Fan 2 178723211 Pin 8: Fan 3 178706511 Pin 11: Fan 4 178708111 Optical block Part Number: A1084662A

Aug 26, 2007 | Sony Grand WEGA KDF-55WF655 36" Rear...

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