I came across several of these Sony G500 21" crts. They had the g2 brightness problem. I fixed three of them using a special cable and windas program. A fourth one does nothing, and a fifth one has a broken power button. How hard is it to switch these power buttons and get one good monitor? I am already familiar with taking the back off. I am not sure if the front must come off to get to the switch, or if I must remove parts internally to get there. The broken button feels limp. The other button is good. While we are at it, if the fourth moniter does nothing at all when turned on,(no power light even) is there a fuse somewhere that needs replaced? Maybe that could be saved. I almost threw them all out, but I have fixed a few of them and they look great. A friend mentioned something about a charge, or a capasitor that can potentially kill you. Is there danger? The two monitors I need to work on have not been plugged in for more than 2 months. Thanks for your time!
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Re: Broken power button
Just take the PCB out of the unit, if its a mechanical switch just hit it and leave it on and reassemble, if its a push button switch just drill a hole next to the switch and use a non metalic object to turn the unit on :-)
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there are several things u can try to reset it. but i have not seen many of reset and continue to work without having other problems. check out this link first. http://youtu.be/jcreuqRxK6w there is a reset on the back of the tablet..l use a paper clip and push the reset button and hold it until it turns off and then push the power and the sound buttons together ..sound button up. if this does work use the power cord to charge it. if this fails return it with the link i use above.. good luck chad man
No,the three CRTS tubes guns coolant chemicals are not as good as before,will causes this problems. Like old dull and hallow colors pictures?Tries websites like Tvrepairwold.com,Tvrepairkits.com to buy a kit to replacemt of it coolant chemicals of one or all three CRTS tube guns.The coolant chemical kit should came with a DVD tutoring how to do it too.
you can bring more brightness by removing cover on your tv and then you will see ther 2 button ther in back of your tv one is FoCUs and other is G2 rotate the G2 button till you see more brightness on your screen put the cover back and that is if you dont know to do that go to one authorised service
1st set Brightness and Contrast settings to 50% at tv menu.
You need to cover 2 CRTs with any thing like thick paper while adjusting 3rd CRT.
For example, lets adjust Red CRT G2 volts, Select audio-video input 1 and cover green and blue lens with paper note-book and rotate Screen control up to level where you see retrace lines on projection screen, now decrease screen volts (G2) so retrace lines disappear and projection screen should be blank.
Now do same process with green and blue adjustment while other lenses should be covered.
Im not sure I conveyed it to you properly or not because English is not my 1st language.
G2 = screen...On the screen controls behind the front grill, behind the hardboard. 6 pots, 2 rows of 3 pots. 3 for focus and 3 for screens. 1 for each of the the red, green and blue guns/crts.
To adjust: Run set, change to black screen with tv/video button. Dial each screen clockwise untill you see a color. Then counterclockwise slowly untill that color goes black, then stop. Do this for all 3 screen controls.
If you need to adjust the focus then bring up lettering. I use the QVC channel for this. Focus is done by eye.
I hope this is whats happening with your set if it is and it sounds like it keep after sony!
Sony received reports of flickering on select rear projection TV models
and immediately started an investigation. Sony's engineering team found
that in a small percentage of sets (less than 1%) made with impregnated
cathode CRTs, the material used to impregnate the cathode may attach
itself to another section of the electron gun and cause a mild
brightness fluctuation or change in hue.
Once this problem was diagnosed, Sony published a Service Fix for this
issue and authorized Sony Service Centers and Authorized Service
Centers to make modifications and replace all 3 CRTs in affected units
at no cost to the consumer in order to resolve the issue. In addition,
a change to the manufacturing line was made to ensure that current
units do not experiencethis problem.
If a consumer is experiencing this symptom, contact Sony Call Center
(800-222-SONY) to schedule a service call. Sony has extended the
warranty on these models for this issue and is working with authorized
service centers, providing all current information for the repair as
well as assisting them in ordering the parts beforehand, so the repair
completed in one call.
could be one or more of three things.
1.could be the crt itself.(sony had a bad bunch of crts for this model)
2.could be the vertical ic on crt board.
3.could be the focus block
in my experience solutions 2 and 3 are more common....
adusting these stuffs needs a special equipment like the color pattern generator. u cannot just adjust this manually. try to inspect the crt circuit board see if there is an open resistor there. u have a luminance problem
without seeing a picture I can guess that you may have a shorted green crt or the drive going to it has changed and you may need to turn down the g2 control for the green. If the tube is shorted or bad see what type of warrantee you have on the crts as some sets have two to 5 years. Good Luck