Sounds like one of two problems. first could be that the color convergenge chips on the circuit board have gone bad. the parts themselves are not very expensive, but a shop will charge upwards of 300 dollars in labor to do the repair. if you can solder, you could probably do it yourself. second problem it could be is a bad picture tube, but that seems unlikely since they usually last upwards of 20 years before getting weak or dim. if you are located near portland, oregon, i can do the work for you for much less. if you have any questions, please send me an email at firstname.lastname@example.org.
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Sony TVs has an Optical Block issue. If there is an issue with the optical block, then there will be green, blue patches or tint on the TV display. Try resetting the TV to the factory settings and try Power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue still persists, then TV may require service. You can contact the Customer relations team and check for the available options. Sony had repaired free of cost for such issues. Hence, contact the customer relations.
There may be some problem with your picture tube else try this that looks like retrace lines. Anyway, you should try to adjust screen pot not focus pot. Make sure you are turning blue screen pot (there are 3 focus pots and 3 screen pots) and do it slowly. If you turn it too much, it will affect your grayscale
I would say your small signal module is bad. This is the board with the convergence ICs. Have a tech or yourself pull the board out and replace the ICs and some resistors. Checkout TVREPAIRKITS.com. They will have your model and its symptoms. Hope to guide you in the right direction!
Picture Mode: Expert1
Fresh Contrast: Off
Noise Reduction: Medium
Black Level: Low
Real Cinema: On
Color Standard: HD (N/A w/HDMI)
White Balance: Warm
**Method: 10-Point IRE
Color Management System
Red Color: 0
Red Tint: 0
Green Color: 0
Green Tint: -15
Blue Color: 0
Blue Tint: 11
Yellow Color: 15
Yellow Tint: 2
Cyan Color: -15
Cyan Tint: 0
Magenta Color: 0
Magenta Tint: -1
lg70 nice tv excellent processor just to bad there is no intensity control on color management oh well still better than what the three s are pushing block out the hype lg will be number 1 in a few years haters are starting to come around and well leds coming,
p.s. i dont work for lg just tired of losers bashing stuff because they dont own it. im isf certified those settings are right on the money straighter than a ruler
I'm not sure if my answer will help much, but it is free. My experieence with this site is that without paying for premium service, you won't get much help.
I had a similar problem with a different model Panasonic projection set.I got no answer on this site, but I did from an outside repairman.
Turn your color all the way down. If it looks black and white it is probably not a bulb problem. If you see a tint (blue, green, red) over the screen, it probably is a weak bulb.
The entire bottom front of my model was held on by velco and could be pulled off.
Behind this was a removable black panel. Behind this were adjustment screws for the three bulbs. This will probably only help temporarily if the bulbs continue to weaken, but it might buy you some time as the replacement bulbs are quite expensive. Good Luck
The first thing I check for this problem when doing a service call is the screen control. It sounds like it needs to be turned down a bit.
The screen controls are in the front of the set. Pull off the front speaker grill, you have to pull it off there are no screws and it's a little tough to pull. Remove the panel behind the speaker grill.
The screen control is normally black with 6 controls. 3 controls labeled Focus and 3 controls labeled Screens. The center controls are for the green.
Find the controls that are labeled Green and turn it counter clockwise until the black is not green anymore.
If there is glue on the control, then, peel it off. You may have to adjust it a bit to get the right alignment.
When the set is turned on, only use one hand inside the set.